00:01
So we're going to be identifying the different groups, which are our columns here on the periodic table that run.
00:11
These are our columns.
00:12
And we're also going to be identifying different periods, which are our rows in the periodic table up element.
00:21
And so first we're going to identify sodium potassium.
00:28
So let's see that.
00:28
We see sodium, n -a, k, and rubidium, r -b.
00:32
So we know that those are all in the same group, right? i should have drawn that in green.
00:38
Those are all in the same group because they're vertical.
00:42
And basically we know that that means that they are in group one.
00:48
So we have group one.
00:56
Then we know that if we're looking for something that begins with b .e...