Question

Give
the electronic configuration
and valency of Be, Na, k.​

Answer 1

Explanation:

Be

electronic configuration-2,2

valency -4

Na

electronic configuration- 2,8,1

valency - 11

K

electronic configuration- 2,8,8,1

valency- 19

Here is your answer....

Answer 2

na = sodium

atomic number = 11

electronic configuration= 2,8,1

valency= +1

k= pottasium

atomic number is 19

electronic configuration is 2,8,8,1

valency = +1

be= beryllium

atomic number is 4

electronic configuration is 2,2

valency = +2