Question

When magnesium ions form compounds with bromide ions, how many magnesium ion(s) are needed to form a neutral compound?

Answer 1

Well magnesium forms a `Mg^(2+)` ion...........

Explanation:

and bromine forms a `Br^(-)` ion...........

And so, if these ions are to make music together, and form a NEUTRAL ionic solid, we need 2 equiv of anion, and 1 equiv of metal ion:

`Mg^(2+) + 2Br^(-) rarr MgBr_2darr`

All I have done here is to conserve mass and charge. Are they conserved?