00:01
In this problem, we're looking at ph3.
00:03
So first, let's draw our lewis structure.
00:07
And to do that, first we need to calculate the number of valance electrons.
00:12
So phosphorus has five, and each hydrogen has one.
00:17
So that gives us eight valence electrons.
00:21
And if each hydrogen gets two electrons, so that's one bond each, we get six electrons.
00:28
Our two electron difference here tells us that we have two electrons that go in phosphors.
00:32
And we know hydrogen can only single bonds.
00:38
So here for our structure, we have one, two, three, four areas of electron density.
00:52
If we want our electronic geometry, we act as if the electron cloud there is another bond...