Question

The electronic structure of atoms of some metals are given below, state the position
of those elements in the modern periodic table :
(1) 2, 8. 4 (2)2, 8, 8.1

Answer 1

Explanation:

first belong to period 3 because ec is 2,8,4

and 2nd belong to period 4 because ec is 2,8,8,1