Question

What is the chemical formula for the compound formed between chromium(VI) and iodine?

Answer 1

`CrI_6`

Explanation:

Chromium VI has an oxidation number value of +6.
Iodide an a negative ion normally has an oxidation number value of -1

`1 xx +6 + 6 ( -1) = 0`

so it takes 6 Iodide ions to balance the 1 Chromium ion of +6

The formula then is

`CrI_6`