What does balancing the charges mean when writing an ionic formula

Balancing the charges in compound's ionic formula means ensuring that the sum of the charges of the radicals making up the ions is zero that is altogether, there is no net charge of the radicals

Explanation:

The guide to writing an ionic formula is as follows;

The radical with the positive charged ion or cation, is written first and the number of the atom with the charge is written as a subscript followed by the radical with the negatively charged ion, is written and the number of the atom possessing the charge is written as a subscript

The sum charges of the of positive and negative ions must be zero such that must be no net charge of the ions.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

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