Calcium forms ions with a charge of +2. iodine forms ions with a charge of -1. which of the following would represent an ionic compound composed of calcium and iodide ions? cal2. cal. ca2l. ca2l. 2cal. cal2.

Well you know that you have to balance out the equation to 0. So if I is -1 and Ca is +2 you know that I had to equal to -2. So you can do that by having two of them. So Ca=+2 and I2=-2 so CaI2 would equal 0 meaning that would be the correct answer. Hope that I explained that correct :)

The option number 1 and 6 are correct answer.

Which is the formula of ionic compound composed of Calcium and Iodide ions is CaI2.

Explanation:As we know a balanced ionic compound has net charge zero.So if the calcium ions have +2 charge so there will be 2 ions of iodine charges of -1 making total charge of iodine -2.Hence -2 and +2 will cancel each other making a balanced ionic compound.Which has formula CaI2.

It changes food into energy that the organism can use.