Drawing Orbital overlap diagram for ammonia

[Evangeline101]

Homework Statement

Homework Equations

none
This is how I was taught to draw orbital overlap diagrams in my lesson:

The Attempt at a Solution

[/B]
I have drawn four attempts for a possible orbital overlap diagram of NH3:

Attempt # 1:

For this one, are the atoms arranged correctly? should it be two hydrogen at the bottom and one at the top?

Attempt # 2:

For this one, it doesn't really follow the example taught in the lesson, but does it make sense to do it like this?

Attempt # 3:

should I be hybridizing it...? Attempt # 4:

Can someone please tell me which and if any of these diagrams are correct?

Any help is appreciated. Thanks :)

 

[DrClaude]

These "Orbital Overlap Diagrams" are very cartoonish representations, so it is hard to say which is wrong or right. I like attempt #2, as it is neater. In the example of water, no hybridization is used for the oxygen, therefore I would guess that it is not necessary to use hybridization for N.