Question

Calculate the valency of an element X whose atomic number is 9​

Answer 1

Answer:

the electronic configuration of an element X with atomic number 9 is : 1s²,2s²,2p5

it's valency=8-7=1

hence the valency of the element is 1.

hope helps u.

Answer 2

Answer:

Its valency = 8−7 =1 Hence, the valency of element with atomic number 9 is 1.