Question

how to find valency without learning
plzz give ans

Answer 1

to find the valency we have to look out at the outermost shell
for example
Sodium
electronic configuration is 2,8,1
1 electron in outermost shell so valency is 1 and it is metal since 1 .2.3 electron in outermost shell is metal
now if there are more then 4 electrons in outermost shell
for example.
Nitrogen
electronic configuration is 2,5 then the valency will be 8-5 = 3
so 1,2,3,4 electrons in outermost shell valency will be 1,2,3,4 respectively but more then 4 that is 5 ,6,7,8 then valency will be 8-5 =3. .
8-6=2
8-7 = 1 and noble gas has valency 0 because it has 8 electrons In outermost shell
8-8 = 0
if u understood then plz mark it brainliest
thanks