00:01
Okay, so lattice energy gets more exothermic as the ionic charges increase and the distance between the ions increase.
00:11
So if you're looking at a, your charges here are plus one and minus one.
00:16
So that really means we're going to be comparing the sizes of sodium and potassium.
00:21
And if you take a look at where they are on the periodic table, potassium is going to be a larger atom than sodium.
00:28
So therefore you'd want to pick the nacl.
00:31
Then for b, you've got the same charges plus one minus one, plus one minus one.
00:37
So then that really means that we're actually comparing the fluoride and the chloride.
00:41
If you look at their location on the periodic table, the chlorine is going to be larger than the fluorine.
00:47
Therefore, the lif would be the one that you would choose.
00:50
And then in c, you have a plus two and a minus one.
00:55
And then a plus two and a minus two here...
