Question

if Z[atomic number]=3, what would be the valency of the element? name the element

Answer 1

Atomic number, Z = 3

So, the element will be LITHIUM ( Li ).

Now, Electronic configuration of Li = 2, 1.

So, here, valence electron is 1.

So, it's valency will be 1.

Answer 2

As Z=3, the electronic configuration will be 2,1. As there is 1 electron in the last orbit, the valency is 1.