9. The element manganese has the atomic number Z = 25. What are the numbers of s, p and d electrons in an atom of manganese?
ANSWER
Analysis of Option/Explanation
For atomic number, Z= 25, the electronic configuration is as follows:-
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 2d5
Now counting all electrons in respective sub shells. We get 8e in “s” subshell followed by 12 e in “p” subshell and 5e in “d” subshell. Hence, option B is the correct answer.
