00:01
Hi there.
00:02
In this question, we want to draw a lewis dot structure for oxygen.
00:12
And oxygen is a diatomic molecule in its pure state as an element, so that means it is o2.
00:20
Well, to draw this lewis dot, we need to represent the valence electrons.
00:25
And when we look at oxygen, it is in group 6a.
00:31
So that means that each oxygen has six valence electrons.
00:36
And there are two oxygen present, so we get a total of 12 valence electrons.
00:48
So our dot structure needs to represent a total of 12 valence electrons.
00:55
And remember when we draw those, each oxygen must end up with an octet.
01:13
Okay, so just with this information, we can probably eliminate most of our choices there.
01:22
For example, the first choice only shows 2, 4, 6, 8.
01:25
Eight, 10 dots total.
01:28
The second choice shows 2, 4, 6, 8, 10, 12 dots, and each oxygen has eight dots around it.
01:38
And we'll look at that a little bit more closely here in a moment.
01:41
The third structure shows 2, 4, 6, 8, 10, 12, 14 dots.
01:48
So it has too many dots.
01:52
And the final structure shows 2, 4, 6, 8, 10, 12, 14, 16 dots.
01:58
And additionally, each oxygen has 10 knots around it...