This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The valency of an element is the number of atoms that can bond with other atoms to form combinations. The valency of an atom can be found calculating the number of electrons necessary to complete the octet