00:01
Here we're just going to be identifying some chemical structures and how the name relates to the structure itself.
00:08
So firstly we've got alkanes here.
00:12
Now the important part of the name is the ains at the end because when we see ains then we know that we only have single bonds in our structure and as you can see here we only have single bonds.
00:26
We've got three carbons and all three carbons have four bonds as carbon has four out of electrons and therefore it can make four bonds.
00:37
If we were to draw the shorthand, it would look like this.
00:41
Well, we don't draw the carbons and hydrogens.
00:43
We simply draw them as lines and that would be propane because we only have three carbons, all single bonds.
00:53
Next, if we were to identify alkene, we would have a double bond present in the hydrocarbon structure.
01:00
As we can see here, we do lose hydrogens when we have double bonds present.
01:06
And that is because each carbon can only have four bonds.
01:10
As we can see, the right hand carbon has one, two, three, four bonds.
01:15
Middle carbon has one, two, three, four bonds.
01:18
So if you were to draw a hydrogen here, that would be wrong...