Question

If an element has configuration 2,8, 1. Its valency will be
Select one:
a1
b. 9
c0
d. 2​

Answer 1

Answer:

11 its Na sodium

Explanation:

a 1.

Answer 2

a) 1

Additional Help : Valency is the combining capacity of an atom . This atom will have to loose 1 electron to gain noble gas configuration . Hence its valency is 1 .

Hope it Helps you !!