Which element has four valence electrons

5. 11. 2. (03.01 MC) An atom's Lewis dot structure has three dots. Which of the following elements could it be, and why? (4 points) Aluminum, because it is in group 13 and has three valence electrons. Lithium, because it is a group 1 element with three total electrons. Magnesium, because it is in period 3 and has three valence electrons ...

Figure 9.4. 1: (a) The radius of an atom is defined as one-half the distance between the nuclei in a molecule consisting of two identical atoms joined by a covalent bond. The atomic radius for the halogens increases down the group as n increases. (b) Covalent radii of the elements are shown to scale.1. Name the element in the 5 th Period of the Periodic Table which contains four 5p electrons. How many valence electrons does this element have? How many d electrons does this element have? Write all possible magnetic quantum number (m l) values for this element.Choose the element, with reasoning, with the more exothermic electron affinity.1. The noble-gas notation for tin (Sn) will contain the symbol. [Kr] Which is the electron configuration for nobelium (No)? [Rn]7s^2 5f^14. Which of the following elements has the fewest valence electrons? lithium. The electron configuration of nitrogen (N) is. 1s^2 2s^2 2p^3.Element : Valence : 1: Hydrogen (-1), +1: 2: Helium: 0: 3: Lithium +1: 4: Beryllium +2: 5: ... We start by determining the number of valence electrons on each atom from the electron configurations of the elements. Carbon has four valence electrons, and oxygen has six. C: [He] 2s 2 2p 2. O: [He] 2s 2 2p 4. We can symbolize this information as shown at the top of the figure below. We now combine one electron from each atom to form covalent ...

9 Element Families. Another common method of categorization recognizes nine element families: Alkali Metals: Group 1 (IA) - 1 valence electron. Alkaline Earth Metals: Group 2 (IIA) - 2 valence electrons. Transition Metals: Groups 3-12 - d and f block metals have 2 valence electrons.This type of bonding would be a covalent bond. Two combinations of atoms can produce this type of bonding: nonmetal/nonmetal or metalloid/nonmetal. In this class, we will not discuss the option of metallic bonding which is a form of covalent bonding. Figure 4.8.1 4.8. 1: Sharing is caring, especially for atoms that participate in covalent bonding.Study with Quizlet and memorize flashcards containing terms like Valence electrons are involved in chemical bonding. (3 points) True False, An atom has the following electron configuration. 1s22s22p63s23p4 How many valence electrons does this atom have? (4 points) 2 4 6 12, An atom's Lewis dot structure has four dots. Which of the following …Valence is generally understood to be the number of chemical bonds that each atom of a given element typically forms. For a specified compound the valence of an atom is the number of bonds formed by the atom. Double bonds are considered to be two bonds, and triple bonds to be three. In most compounds, the valence of hydrogen is 1, of oxygen is ...Figure 3.4.1 3.4. 1: The social security number subatomic-the proton. Since atoms are neutral, the number of electrons in an atom is equal to the number of protons. Hydrogen atoms all have one electron occupying the space outside of the nucleus. Helium, with two protons, will have two electrons.Valence electrons are the electrons in the highest occupied principal energy level of an atom. In the second period elements, the two electrons in the 1 s sublevel are called …c) A has 3 valence electrons; B is a halogen. d) A forms a ; Which of the following elements forms an ion that is smaller than its atom? (a) phosphorus (b) fluorine (c) oxygen (d) magnesium. Which of the following elements is a metal? a. Nitrogen b. Fluorine c. Argon d. Strontium e. Phosphorus; Which element has a valence electron configuration ...

On the other hand, "boron", and "argon" have 3 and 8 valence electrons respectively. "Aluminum" and "calcium" have 3 and 2 valence electrons respectively. And "potassium" and "magnesium", have 1 and 2 such electrons. And if you are doing your chemistry homework, there SHOULD be a Periodic Table in front, that graphically gives you the ...Select the statement that correctly describes one of the bulk elements necessary for life. Click the card to flip 👆 Carbon (C) has four valence electrons and is likely to form covalent bonds.Which 2 element has 2 valence electrons and is in period 4? calcium. The element is in Period 4 and Group 2. Even though the 4s sublevel is filled, the last electron went into that sublevel, making it a member of the s-block. It has 2 valence electrons.Answer. Answer. Calcium. Explanation : See Periodic table. Match row and column. Row for Period and column for valence electron. Means Calcium is an element which lies at Period 4 in Periodic table and having two valence electrons (Period 4 means 4th shell being occupied having 2 electrons in 4th or outermost shell)History. In 1913 Bohr proposed a model of the atom, giving the arrangement of electrons in their sequential orbits. At that time, Bohr allowed the capacity of the inner orbit of the atom to increase to eight electrons as the atoms got larger, and "in the scheme given below the number of electrons in this [outer] ring is arbitrary put equal to the normal valency of the corresponding element."

Nwaonline obits.

And for the excited state, it is 1s 2 2s 1 2p 1. The shorthand electron configuration for Beryllium is [He] 2s 2. The electron configuration for the Be 2+ is 1s 2. The number of valence electrons available for Beryllium atoms is 2. Beryllium is situated in Group 2nd and has an atomic number of 4.Generally, metals will lose electrons to achieve a valence shell of eight electrons. Non-metals tend to gain electrons to obtain eight electrons. Certain atoms tend to have a certain number of bonds to meet the octet rule. For example, carbon will almost always have four bonds. Nitrogen will almost always have three bonds plus a lone pair.Select the statement that correctly describes one of the bulk elements necessary for life. Click the card to flip 👆 Carbon (C) has four valence electrons and is likely to form covalent bonds. Apr 26, 2019 ... This phenomenon is called catenation. It might be mainly due to presence of four valence electrons in their outermost shell. A large number ...

This page titled 4: Valence Electrons and Bonding is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Elizabeth Gordon. Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond ….Carbon has 4 valence electrons, each oxygen has 6 valence electrons, and there are 2 more for the −2 charge. This gives 4 + (3 × 6) + 2 = 24 valence electrons. ... Resonance: All elements want an octet, and we can do that in multiple ways by moving the terminal atom's electrons around (bonds too). 3. Assign Formal Charges via …In methane, carbon has a valence of 4; in ammonia, nitrogen has a valence of 3; in water, oxygen has a valence of two; and in hydrogen chloride, chlorine has a valence of 1. …Sodium, because it is in group 1, it has 1 valence electron. Like all period 3 elements, it has 3 energy levels. This answer is: Wiki User. ∙ 10y ago. Copy. Silicon. Its electron configuration ...All elements in this group have four valence electrons. These are the outermost electrons, farthest away from the center of the atom, that determine some of the element's properties.What do elements have three valence electrons? Aluminum s2p1 has 3 valence electrons and an oxidation state of +3 or Al+3. Oxygen s2p4 has 6 valence electrons and an oxidation state of -2 or O−2. The common multiple of 2 and 3 is 6. We will need 2 aluminum atoms to get a +6 charge and 3 oxygen atoms to get a -6 charge.It stacks the elements in columns according to the number of valence electrons in an atom of the element. Valence electrons are those in the outermost shell of the atom and the ones that participate in reactions. The number of valence electrons is associated with the element’s reactivity. As we can see, chlorine has seven electrons in the 3 s \rm 3s 3s and 3 p \rm 3p 3p orbitals, which are the valence electrons. For groups 13 to 18, subtract 10 from the group number to get the number of valence electrons, e.g., elements from group 13 will have three valence electrons, from group 14 four valence electrons, and so on.PowerPoint's many features can be overwhelming to new presenters. As you work with the program, it can be useful to create a list of the PowerPoint elements you use most often. Consider the operations you perform in PowerPoint, as well as t...

Study with Quizlet and memorize flashcards containing terms like Which element has the fewest valence electrons available for bonding?, Which element has the greatest number of valence electrons available for bonding?, Some atoms are exceptions to the octet rule by having an expanded octet. Which characteristic is needed for an atom to have an expanded octet? and more.

Aug 10, 2023 · The element is sulfur (S, #16). [Ne] means neon is the nearest noble gas with a lower atomic number. The 3s23p4 means electrons have filled the 3s2 sublevel, and 4 out of 6 possible locations in ... May 20, 2018 · Exercise 10.4.1 10.4. 1. Use Lewis electron dot diagrams to illustrate the covalent bond formation in Cl 2. Answer. When working with covalent structures, it sometimes looks like you have leftover electrons. You apply the rules you learned so far, and there are still some electrons that remain unattached. Jun 13, 2017 · "Aluminum" and "calcium" have 3 and 2 valence electrons respectively. And "potassium" and "magnesium", have 1 and 2 such electrons. And if you are doing your chemistry homework, there SHOULD be a Periodic Table in front, that graphically gives you the electronic structure. Is there? And if it is there you still have to learn how to use it ... What element in the fourth period of the periodic table has 5 valence electrons? In which group do all the elements have the same number of valence electrons? (a) P, S, Cl (b) Ag, Cd, Ar (c) Na, Ca, Ba (d) N, P, As (e) None of these. Which element has a valence electron configuration of 4s^2 4p^1?4: Atoms and Elements 4.7: Ions - Losing and Gaining Electrons Expand/collapse global location ... In cases where an atom has three or fewer valence electrons, the atom may lose those valence electrons quite easily until what remains is a lower shell that contains an octet. Atoms that lose electrons acquire a positive charge as a result because ...Valence electrons are the electrons in the highest occupied principal energy level of an atom. In the second period elements, the two electrons in the 1 s sublevel are called …Again, since the number of electrons equals the number of protons in a neutral element, and there are two 4s, ten 3d, and four 4p electrons, there must be. 18 +2 +10 +4 = 34. total electrons in the element, which correspond to 34 total protons in the element. When you look it up, you should locate selenium and find that it has atomic number 34.This page titled 4: Valence Electrons and Bonding is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Elizabeth Gordon. Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond ….3.1-4. Valence Electron Configurations of Transition Elements The valence electron configuration of the first row transition elements has the form 4s 2 3d b, where b is the position of the element in the d block.Cr and Cu are the two exceptions because they each promote one of their 4s electrons into the 3d sublevel to obtain half-filled and completely filled 3d sublevels.Lithium has 3 electrons --- 2 in the first shell, and 1 in the second shell (so one valence electron). Beryllim has 4 electrons --- 2 in the first shell, and 2 in the second shell (so two valence electrons). ... The number of valence electrons for each main group element can be determined by the column, or group, it occupies on the periodic table. …

Genesis fs card services kays.

Cydy chat.

Chapter 4 Quiz Chem30A. 5.0 (1 review) For representative elements, valence electrons are those electrons located. a) closest to the nucleus. b) in the outermost subshell. c) in the outermost shell. d) in s orbitals. Click the card to flip 👆. c) in the outermost shell.For atoms with partially filled d or f subshells, these electrons are typically omitted from Lewis electron dot diagrams. For example, the electron dot diagram for iron (valence shell configuration 4s 2 3d 6) is as follows:. Elements in the same column of the periodic table have similar Lewis electron dot diagrams because they have the same valence shell electron configuration.Carbon is a chemical element with an atomic number 6 and an atomic symbol C. It belongs to Group-14 and the second period. Carbon has twice as many electrons in its second shell as in its first shell. Electronic configuration of Carbon: The electronic configuration of Carbon is 1 s 2 2 s 2 2 p 2. The distribution of electrons per shell is 2, 4.Oxides of later 3d elements such as Fe 2 O 3, NiO, and Cu 2 O; Layered transition metal chalcogenides with d 0, d 2 and d 6 electron counts including TiS 2, ZrS 2, MoS 2, WSe 2, and PtS 2; ... In crystalline Si, each atom has four valence electrons and makes four bonds to its neighbors. This is exactly the right number of electrons to ...In conclusion, the 7 valence electrons are the electrons in the outermost shell of an atom. All atoms in the same group of the periodic table have the same number of valence electrons. Group 7 elements, which are also known as the halogens, all have 7 valence electrons. These include the elements fluorine, chlorine, bromine, iodine, and astatine.You may assume that the valences of the elements—the number of electrons with which an atom will bond or form—are those that can be derived by looking at the groups (columns) of the periodic table. While these are the most common valences, the real behavior of electrons is less simple. Here is a table of element valences.For example: carbon does not form ionic bonds because it has 4 valence electrons, half of an octet. To form ionic bonds, Carbon molecules must either gain or lose 4 electrons. This is highly unfavorable; therefore, carbon molecules share their 4 valence electrons through single, double, and triple bonds so that each atom can achieve noble gas ...The four valence electrons in a carbon atom can do this by forming four single bonds, or by forming two single bonds and a double bond, by forming one single ...Jan 23, 2023 · For example: carbon does not form ionic bonds because it has 4 valence electrons, half of an octet. To form ionic bonds, Carbon molecules must either gain or lose 4 electrons. This is highly unfavorable; therefore, carbon molecules share their 4 valence electrons through single, double, and triple bonds so that each atom can achieve noble gas ... We can see from the electron configuration of a carbon atom—1s 2 2s 2 2p 2 —that it has 4 valence electrons (2s 2 2p 2) and 2 core electrons (1s 2). You will see …Some books and dictionaries define valence electrons as "outer shell electrons that participate in chemical bonding" and by this definition, elements can have more than 8 valence electrons as explained by F'x. Some books and dictionaries define valence electrons as "electrons in the highest principal energy level". ….

1. Carbon has four electrons in its valence shell and completes its octet by sharing its four electrons with four chlorine atoms to form a carbon tetrachloride (CCl 4) molecule, as shown below. 2. Nitrogen has five electrons in its valence shell and completes its octet by sharing its three electrons with three hydrogen atoms to form NH3 (Ammonia).Nitrogen has 5 electrons present in its valence shell. Valence electrons in hydrogen: The atomic number of hydrogen is 1. It is present in group 1 of the Periodic Table of Elements. Electron shells Elements 1-18. Watch on.Carbon’s ability to form bonds with four other atoms goes back to its number and configuration of electrons. Carbon has an atomic number of six (meaning six protons, and six electrons as well in a neutral atom), so the first two electrons fill the inner shell and the remaining four are left in the second shell, which is the valence (outermost ...Responses. fluorine. How many valence electrons do most stable atoms have? 8. Use the periodic table to answer the question. Which atom generally obtains a stable configuration by sharing electrons? (p) Which statement best explains why carbon bonds to four hydrogen atoms to form methane but to only two oxygen atoms to form carbon dioxide ...In conclusion, the 7 valence electrons are the electrons in the outermost shell of an atom. All atoms in the same group of the periodic table have the same number of valence electrons. Group 7 elements, which are also known as the halogens, all have 7 valence electrons. These include the elements fluorine, chlorine, bromine, iodine, and astatine.For main group elements (i.e s-block and p-block elements), the valence electrons are the electrons present in the outermost orbit. But for most of the transition and inner transition elements, the valence electrons are the electrons present in the shells outside the noble gas core.AboutTranscript. The Lewis diagram of a molecule can be constructed using the following stepwise procedure: (1) Find the number of valence electrons in the molecule. (2) Draw single bonds between bonded atoms. (3) Distribute the remaining electrons throughout the molecule, keeping in mind the duet and octet rules.The valence electrons for main group elements are those with the highest n level. For example, gallium (Ga, atomic number 31) has the electron configuration [Ar]4s 2 3d 10 4p 1, which contains three valence electrons (underlined). The completely filled d orbitals count as core, not valence, electrons. Transition elements or transition metals.Valence Electrons: Valence electrons are the electrons found in the outermost shell of an atom's electron cloud. While the number of shells increases by one for every row, or period, on the periodic table, the number of valence electrons for any element that is not a transition metal will equal the last digit of its column number on the periodic table.What element has 4 protons 4 electrons and 5 neutrons? beryllium 4 protons, 5 neutrons, and 4 electrons are there in an atom of beryllium. Which period has 4 electron shells? The p-block elements of period 4 have their valence shell composed of 4s and 4p subshells of the fourth (n = 4) shell and obey the octet rule. Which element has four valence electrons, This type of bonding would be a covalent bond. Two combinations of atoms can produce this type of bonding: nonmetal/nonmetal or metalloid/nonmetal. In this class, we will not discuss the option of metallic bonding which is a form of covalent bonding. Figure 4.8.1 4.8. 1: Sharing is caring, especially for atoms that participate in covalent bonding., Generally, metals will lose electrons to achieve a valence shell of eight electrons. Non-metals tend to gain electrons to obtain eight electrons. Certain atoms tend to have a certain number of bonds to meet the octet rule. For example, carbon will almost always have four bonds. Nitrogen will almost always have three bonds plus a lone pair., Each of the elements in this group has 4 electrons in its outer shell. An isolated, neutral group 14 atom has the s 2 p 2 configuration in the ground state. These elements, especially carbon and silicon, have a strong propensity for covalent bonding, which usually brings the outer shell to eight electrons., The electronic configuration of each element is decided by the Aufbau principle which states that the electrons fill orbitals in order of increasing energy levels. The equation is: 1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s<5f<6d<7p. The concept of electronic configuration has replaced the older concept of valency and valence electrons. , This page titled 4: Valence Electrons and Bonding is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Elizabeth Gordon. Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond …., Best Answer. It means that there are 4 electrons on its outer most ring, but only neutral atoms have valence electrons. Since carbon has 4 valence electrons it either needs to lose 4 electrons or ..., As we can see, chlorine has seven electrons in the 3 s \rm 3s 3s and 3 p \rm 3p 3p orbitals, which are the valence electrons. For groups 13 to 18, subtract 10 from the group number to get the number of valence electrons, e.g., elements from group 13 will have three valence electrons, from group 14 four valence electrons, and so on., C We obtain the valence electron configuration by ignoring the inner orbitals, which for phosphorus means that we ignore the [Ne] closed shell. This gives a valence-electron configuration of 3 s2 3 p3. Exercise 6.8.1 6.8. 1. Draw an orbital diagram and use it to derive the electron configuration of chlorine, Z = 17., Chemistry. Chemistry questions and answers. 1)If an element has atoms, in their ground-state, with 4 valence electrons, the element could be: (check all possible answers) a) Sn b) Be c) S d) Ti 2)Which transition metal cation, in its ground-state, has the configuration: 1s22s22p63s23p63d5 3) There are 118 known elements. How many elements have ..., Answer. Calcium. Explanation : See Periodic table. Match row and column. Row for Period and column for valence electron. Means Calcium is an element which lies at Period 4 in Periodic table and having two valence electrons (Period 4 means 4th shell being occupied having 2 electrons in 4th or outermost shell), The least energetic electrons are those in energy level I, also known as energy level K. Higher level electrons have more energy as you move out from the nucleus, and this energy gain is stable and discontinuous. The electronic configuration of Vanadium (23) is 1s²2s²2p⁶3s²4s²3d³. Hence, Vanadium has 3 valence electrons and 4 energy levels ., Sep 13, 2021 · The valence electrons of an atom are the electrons in its outermost energy level and are involved in chemical bonding.In Carbon atom, there are four valence electrons present in its outermost energy level.To draw the Lewis structure of Carbon, place one dot on each of the four sides of the element symbol, which represents the valence electrons ... , The elements which are in the same groups have the same number of valence electrons (i.e same number of electrons in the outermost shell). Also they possess almost similar properties. Yes there are also few exceptions in the elements of d-block and f-block. But in general, for the main group elements (s-block and p-block), the elements of same ..., What do elements have three valence electrons? Aluminum s2p1 has 3 valence electrons and an oxidation state of +3 or Al+3. Oxygen s2p4 has 6 valence electrons and an oxidation state of -2 or O−2. The common multiple of 2 and 3 is 6. We will need 2 aluminum atoms to get a +6 charge and 3 oxygen atoms to get a -6 charge., Group of answer choices. period 4; group 8. period 5; group 6. period 4; group 6. period 4; group 16. period 5; group 18. An element that has the valence electron configuration 4 s2 4 p4 belongs to which period and group? Group of answer choices. period 4; group 8., A In a noble gas configuration the orbitals are fully filled. …. For Questions #9-13, use the following electronic configurations of elements: Element A: 152252206 Element B: 1822s22p2 Element C: 1s22s22p63p5 Element D: 152251 9. Which element has four valence electrons ? a) A b) B c) C I d) D 10., Thus, an atom continues to form bonds until an octet of electrons is made. This is known as octet rule by Lewis. Normally two electrons pairs up and forms a bond, e.g., H2 H 2. For most atoms there will be a maximum of eight electrons in the valence shell (octet structure), e.g., CH4 C H 4., Which of the following has a total of five lone pairs of electrons? What element's valence electrons are located in 5s^25p^4? Which of the following elements have 5 valence electrons? a. V b. F c. P d. As; State the number of valence electrons for each of the following: (a) He (b) Pb (c) Ne (d) B; 1., For representative elements, the number of valence electrons equals the group number on the periodic table. To draw the Lewis structure of an atom, write the symbol of the atom and draw dots around it to represent the valence electrons. Note that hydrogen is often shown in both group 1A and group 7A, but it has one valence …, What element has three valence electrons in the 6p shell? What element has 6 valence shell electrons and 16 protons? Which of the following does not have 8 valence electrons? a) Ar b) Kr c) Cl d) Ne; Which atom has the highest ionization energy? a. Na b. P c. Cl d. K; Which element is more likely to gain electrons: Na, F, or Ne? Which of the ..., The number of electrons present in the outermost shell is 4. Thus, the element has 4 valence shell electrons. So, the period number of this element is 4. And the group number to which the element belongs will be equal to: \[\begin{align} & (\text{No}\text{. of valence electrons}+10) \\, Study with Quizlet and memorize flashcards containing terms like How many valence electrons does each atom of arsenic (As) have? Arsenic is element 33. It is in period 4 and family 15 (5A or the Nitrogen family)., Two representative elements are in the same period of the periodic table. Which statement correctly describes the atoms of the two …, The next atom is boron. Its valence electron shell is 2s 2 2p 1, so it has three valence electrons. The third electron will go on another side of the symbol: \[\mathbf{\dot{Be}}\mathbf{:}\] Again, it does not matter on which sides of the symbol the electron dots are positioned. For carbon, there are four valence electrons, two in the …, Each hydrogen atom (group 1) has one valence electron, carbon (group 14) has 4 valence electrons, and oxygen (group 16) has 6 valence electrons, for a total of …, The element which has four valence electrons is _____.(A) H. B) Na. C) Mg. D) Si. E) S. Expert Solution. Trending now This is a popular solution! Step by step Solved in 2 steps. See solution. Check out a sample Q&A here. Knowledge Booster. Learn more about Quantum Mechanical Model of Atom., It is a ductile metal with a hardness similar to that of silver. Its 58 electrons are arranged in the configuration 4f 1 5d 1 6s 2, of which the four outer electrons are valence electrons. … This gives rise to dual valence states. What element has most valence electrons? Elements with the most valence electrons are in group 18. What is the 59 ..., On the other hand, "boron", and "argon" have 3 and 8 valence electrons respectively. "Aluminum" and "calcium" have 3 and 2 valence electrons respectively. And "potassium" and "magnesium", have 1 and 2 such electrons. And if you are doing your chemistry homework, there SHOULD be a Periodic Table in front, that graphically gives you the ..., Figure 5.17.1 5.17. 1 Comparison of 3d (gray) and 4s (red) electron clouds for a vanadium atom. There is a vertical and horizontal axes. The axis has the units picometers. Around the origin is a four lobe shaped region forming an "X" shape around the origin. This region is highly concentrated with grey dots., Each Lewis dot symbol consists of the chemical symbol for an element surrounded by dots that represent its valence electrons. Cesium, for example, has the electron configuration [Xe]6 s1, which indicates one valence electron outside a closed shell. In the Lewis dot symbol, this single electron is represented as a single dot: Figure 8.6 G. N ..., This page titled 4: Valence Electrons and Bonding is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Elizabeth Gordon. Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond …., Protons, Neutrons and Electrons of all the Elements: Shell Diagram: 1: Hydrogen has 1 proton, 0 neutron and 1 electron: 2: Helium has 2 protons, 2 neutrons and 2 electrons: 3: Lithium has 3 protons, 4 neutrons and 3 electrons: 4: Beryllium has 4 protons, 5 neutrons and 4 electrons: 5: Boron has 5 protons, 6 neutrons and 5 electrons: 6, Some books and dictionaries define valence electrons as "outer shell electrons that participate in chemical bonding" and by this definition, elements can have more than 8 valence electrons as explained by F'x. Some books and dictionaries define valence electrons as "electrons in the highest principal energy level"., 3.1-4. Valence Electron Configurations of Transition Elements The valence electron configuration of the first row transition elements has the form 4s 2 3d b, where b is the position of the element in the d block.Cr and Cu are the two exceptions because they each promote one of their 4s electrons into the 3d sublevel to obtain half-filled and completely filled 3d sublevels.