How do you determine the empirical formula from Ca and F. No percentages to make it easy.?

Question

I understand the process when there are percentages given, but to just have two elements alone, how do you do it? Mg and N?

Answer 1

In both cases you mention, they are ionic bonds and have only one possible combination. So the empirical formula is it.

Just do the ionic criss cross method and you have it.

Its easier than the molcular compounds.

Answer 2

The simplest ratio in which Ca and F combine is 1:2.
This is determined from the charges on the ions. Ca is +2
and F us -1. So the empirical formula will be CaF2

Answer 3

How many electrons does Ca lose to make an ionic compound, such as the fluoride? How many electrons does each F gain? Then charges have to balance. The same principle applies to Mg and N.

That's all!

Answer 4

.