00:01
All right, so let's assume we have two atoms.
00:03
We have carbon 14 and we have carbon 12.
00:08
So let's draw carbon 14.
00:10
You'll see it written like this.
00:12
This is atomic notation.
00:14
Specifically, this is isotope notation.
00:17
So we have isotope notation.
00:24
Here we have our element, which is carbon.
00:28
And then over here we have the mass number.
00:30
So this part's really important.
00:31
I'm going to go ahead and write that down.
00:32
This is the element, and then this is the mass.
00:41
Now we also have carbon 12.
00:44
You might be wondering, what is the difference between them? well, this 14 is the mass, and this 12 is the mass.
00:52
Now, the mass equals two things...