Question

Z is equals to 5 what will be the valency of the element

Answer 1

Z=atomic no.
z=5
so...,

eletronic conf.=2,3

Valancey=3......ANS....

Answer 2

Yaa , the right answer is 3 . z = atomic no. = 5 and. electronic confirmation = 2,3. so , valency = 3 and it is metal i.e. Boron.