Question

What is the formula of the ionic compound expected to form between the elemetns ca and i

Answer 1

`CaI_(2)`

Step-by-step explanation:

Calcium, Ca, has an oxidation state of two. Chlorine, Cl, is 1. We can see that we'd need 2 Cl atoms for every 1 Ca atom: CaI2

`Ca^(+2)` +
`2I^(-1)` =
`CaI_(2)`

This compound's name is Calcium iodide. It is used both in photography and in cat food as a source of iodine.