Question

Atomic number of an element is 9 .Its valency is ______​

Answer 1

Answer:

1 is the answer

Explanation:

As nucleus of the element contains nine protons, its atomic number is 9. Hence, the electronic configuration of the element is 2, 7. It needs one more electron to attain the stable inert gas configuration. Hence, its valency is 1.

Answer 2

Answer:

-1 . It has to donate 1 electron from its outer shell to become stable