Question

write the electronic contrigation of sodium and chlorine also find its valency​

Answer 1

Answer: Sodium valance electron is 1 as its electronic configuration is 2 8 1 and chlorine valance electron is 7 as its electronic configuration is 2 8 7.

Explanation:

Answer 2

Answer:

valency of sodium= +1  and  valency of chlorine= -1

Explanation:

sodium (11)= 2,8,1

so, the last valance electron is it's valency= +1

chlorine (17)= 2,8,7

so, to find it's valency we have to subtract the last valence electron to get valency

= 8-7= -1

* always remember the valency is always 1,2,3 and 4 and the element having valency 4 is metalloid.

* metal have positive electron and non-metal have negative electron.