Question

How to calculate the valency of polyatomic ions?​

Answer 1

Explanation:

To determine the number of electrons in polyatomic ions you will need to determine the number of valence electron for each element present in the ion and make a correction given the charge of the ion.

Example 1:

O

H

−

=

Oxygen has 6 valence electrons

Hydrogen has 1 valence electron

Need 1 more to get the charge of -1

Total number = 8