Draw the lewis interaction and the result after the interaction for the following ionic compounds: magnesium bromide and rubidium phosphide

Question

Could you please answer this question and help me out, I am having trouble with it.

Answer 1

Magnesium bromide = MgBr₂

[Br]^- [Mg]²⁺ [Br]^- since I can't easily draw Lewis structures, you just put 8 dots (electrons) around each Br and no dots around Mg

Rubidium phosphide = Rb₃P

[Rb]⁺ [P]^3- [Rb]⁺

..........[Rb]⁺

put 8 dots around the P and no dots around the Rb