How can we identify the number of group from electronic configration of any element if it ended in 3d^8 4S^2 I know group no. = total no. of valence but whats the valence here in this situation?

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How can we identify the number of group from electronic configration of any element if it ended in 3d^8 4S^2 I know group no. = total no. of valence but whats the valence here in this situation?

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Answer 1 · 2017-06-05T03:38:16

The electron configuration must finish like this: $4s^2 3d^8$ .

Explanation:

The element is Nickel ( $"Ni"$ ) with $28$ valence eletrons.

The period is identified looking at the level of energy ( $n$ ) which is the number $4$ , for the $4s$ orbital. This means $"Ni"$ is in the fourth period in the periodic table.

The group number is normally related to the valence electrons. However, this relation does not include the transition metals from group $"VIIIB"$ (e.g. $"Fe", "Co", "Ni"$ , . . . ).

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How can we identify the number of group from electronic configration of any element if it ended in 3d^8 4S^2 I know group no. = total no. of valence but whats the valence here in this situation?

1 Answer

Explanation:

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