Question

Two elements have atomic numbers 12 and 17 respectively. Find

their valencies.Give proper steps. ​

Answer 1

Answer:

electronic configuration of Atomic number 12= 2,8,2

Valency= 2

Electronic configuration of Atomic number 17=

2,8,7

Valency= 1

Answer 2

Explanation:

Valentines are 2 and 1. Hope it helps you