00:01
Okay, so since lattice energy increases or becomes more, you could think of this as becoming more exothermic as ionic charges increase and the distance between the ions decreases.
00:13
We want to take a look at the charges and the sizes of the atoms.
00:19
So here, charges, we've got positive one and a negative one on both compounds.
00:24
So really that means we're comparing the lithium and the cesium.
00:26
And if you look at where they are on the periodic table, cesium is lower than lithium.
00:30
So cesium is the larger atom.
00:33
So we would want to pick the lif.
00:35
Then for b, you also have the similar charges, the plus one and the minus one.
00:40
So that means that we're going to be comparing the bromine and the iodine.
00:44
And if you look at where they're located on the periodic table, iodine is lower than bromine in the same group.
00:51
So that means that iodine is larger.
00:54
So we would want to pick the sodium bromide...
