00:01
There, in this question, we are trying to determine the correct lewis structure for hpo.
00:08
So the way that lewis structures are written is to first determine the number of valence electrons that each element brings to the compound.
00:15
Well, hydrogen's in group 1a.
00:17
All the elements in group 1a have one valence electron.
00:20
Phosphorus from group 5a, all of those elements have five valence electrons, and oxygen is in group 6a.
00:28
They all have six valence electrons.
00:29
This gives us a total of 12 valence electrons to work with.
00:39
Or in other words, 12 dots.
00:43
The other thing we have to remember is that each element needs an octet.
00:54
All right, and an octet means 8 electrons, except for hydrogen, which only needs 2.
01:10
Okay, so let's go ahead and start off the structure.
01:15
We know that each of these elements has to be here...