Ionic Bonds/Covalent Intro

Question

Draw the Lewis dot structure for CaI₂. 

Please explain, too.

Answer 1

Difficult to "draw" on this platform, but here's what the Lewis dot structure would look like for CaI2.

Ca loses 2 electrons to become Ca²⁺ (no dots around the Ca)

There are 2 I atoms and each one gains an electron to become I^-. Each I used to have 7 valence electrons so now each has 8 electrons. So the Lewis dot would look something like this...

[I^-] [Ca²⁺] [I^-] but put 4 pairs of electrons around each I^- ion