00:01
Okay, so the first thing i'm going to do is write down the formula of cesium chloride and barium chloride.
00:06
So we see that cesium is a group one metal, right? so it has a plus one oxidation state.
00:12
And we see that chloride is a collagen, so it has a negative one oxidation state.
00:18
So if we were to write the formula, right, we bring the one down to both sides, and we get cscl.
00:25
Now, let's look at the figure that they give us for cesium chloride.
00:30
We see that there are 8 chloride atoms at the corner of each cube, right? so 8 chloride atoms at the corner of each cube.
00:37
But one thing that we have to know is that an atom at the corner of a cube means that it's only 1 eighth inside the cube.
00:43
Right, so we got to multiply by 1 eighth.
00:46
And we get 1 chloride atom.
00:48
Now if we look at the cesium atom, right, we see that there is one cesium atom that is directly inside the cube.
00:55
And any atom that is inside the cube, you multiply by 1st ,000.
01:00
One or you don't multiply anything at all, right? and you get one cesium.
01:07
Right, so if we were to write this down, we have one cesium and one cl, so we get c.
01:11
S .c .l...