Question

how is valency of an element determined​

Answer 1

Answer:

The valency of an element measures its ability to combine with other elements. The valency is determined by the number of electrons in the outer shell of each atom of an element.

Answer 2

Explanation:

An atom can have a maximum of 8 electrons in its outermost orbit. The presence of 8 electrons in the outermost shell indicates stability of an atom. An atom tends to lose electron if it has one to four electrons in its outermost orbit. ... Therefore, we determine the valency by subtracting the numbers of electrons from 8.