How many electrons are exchanged when calcium bonds with nitrogen?

Answer 1

Calcium has 2 valence electrons, which it will lose.

Nitrogen has 5 valence electrons and would like 3 more to reach an octet.

When Ca and N combine, you form calcium nitride = Ca3N2

Each of the 3 calciums loses 2 electrons for a total of SIX electrons.

Each nitrogen picks up 3 electrons (6 total).

So, the TOTAL NUMBER OF ELECTRONS TRANSFERRED IS SIX