What is the molecular geometry of the N atom in the molecule...

What is the molecular geometry of the N atom in the molecule FNNF (structural formula)? (Note: while the arrangement of the electron pairs determines the spatial arrangement of electron pairs, the name of the geometry is based on the position of the atoms. Both N atoms have the same geometry.) tetrahedral trigonal planar trigonal pyramidal bent linear

Transcript

00:01 Hello.

00:03 To determine the molecular geometry, that is the shape of the molecule when we're looking at the atoms in it, what we need to first do is sketch out the lewis structure.

00:14 So we know we have two nitrogens, and those are bonded, each one to a fluorine.

00:23 Well, each fluorine is a halogen.

00:26 So each fluorine will have seven valence electrons with the opportunity to make one covalent bond.

00:34 I'm going to make the nitrogen.

00:36 Electrons a different color, not because electrons are different, but just so that we can see which ones belong to each nitrogen.

00:43 Okay, so one of the nitrogen electrons is going to be used to make a single bond with each flooring.

00:52 All right, nitrogen's in group five of the periodic table.

00:55 So each nitrogen has five valence electrons of its own.

00:58 We know that we need at least a single bond to hold the nitrogen's together.

01:05 So that takes up three of nitrogen.

01:10 Five electrons.

01:16 Okay, that means the remaining electrons are going to need to go to try to fill up the octet.

01:29 But at this point, i only have one more electron remaining for each nitrogen, and each nitrogen only has six dots around it.

01:38 So that tells me that those remaining two electrons must form another covalent bond for a double covalent bond between nitrogen.

01:48 So we see that each nitrogen has brought in five electrons.

01:52 The fluorings have each brought in seven.

01:54 Everything has an octet...

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