How can I write the formula for magnesium phosphide?
Magnesium Phosphide has a formula of
Magnesium is a metal cation with a charge of
Phosphorus is a nonmetal anion with a charge of
In order to bond ionically the charges must be equal and opposite.
It will take two -3 phosphide ions to balance two +2 magnesium ions forming a magnesium phosphide molecule of
I hope this was helpful.