The nature of binding for a crystal with alternate and evenly spaced positive and negative ions is

Two identical conducting balls $A$ and $B$ have positive charges $q_{1}$ and $q_{2}$ respectively,where $q_{1} \neq q_{2}$. The balls are brought together so that they touch each other and then separated to their original positions. The force between them is

Assertion $(A)$: Electromagnetic force is enormously strong as compared to gravitational force. Yet,gravity dominates in large-scale phenomena (e.g.,formation of galaxies).
Reason $(R)$: Existence of positive and negative charges makes matter mostly electrically neutral.
Which of the following is true?

Mention the $SI$ unit and value of fundamental charge. Write its smaller units.

Faraday is the unit of

Can we neglect the quantization of charge? If yes,then mention the situation.