Question

Total number of elements of 5th period which have one or more than one 5d electrons :-
O 10
O 16
O 30
zero​

Answer 1

Explanation:

Since s = ± 1 / 2 , each orbital can fit two electrons, thus total count of electrons is = 2 × 9 = 18 , which is also the total number of elements in the third shell