Answer :
Explanation:
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The number of valance electron is 6
Valence electrons are the electrons found in the outermost shell of an atom.
The given atom has the following electronic configuration;
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴
The number of valence electron in a given electronic configuration is determine as follows;
- if the last configuration ends in s-orbital, the valence electron is the number of electron attached to the s-orbital
- if the configuration ends in p-orbital, the number of valence electron is obtained by adding the electrons in p-orbital and s-orbital
The number of valance electron is found in this sub-orbitals = 4s², 4p⁴
The number of valance electron = 2 + 4 = 6
Thus, the number of valance electron is 6
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