Question

formula to find it valency of an element​

Answer 1

Answer:

If the number of electrons in the outer shell is between one to four, the compound is said to have positive valency. For compounds with electrons four, five, six, or seven, the valency is determined by subtracting the electron from eight.

Explanation:

it's a simple question

Answer 2

if the number of electrons in the outermost shell is between 1 to 4 then the valency of the element is same as that of number of electrons in outermost shell

the number of electrons in the outermost shell is Five or more than the valency is calculated by subtracting the number of electrons from 8