00:02
Oops.
00:04
We on this are given a number of formulas and from the formula and i'll put a couple down here we have first h2o.
00:12
Make this bigger so i can read what i'm looking at here.
00:16
Sf2 and ni3.
00:27
And for each of these we are going to write the electron doc structure, the steric number, electron group arrangement, number of bonded electrons, and the molecular shape.
01:12
I'm going to slide over just a smidge here and then whether it's polar or non -polar.
01:22
Okay let's start with water.
01:24
Our electron dot for water.
01:36
Our steric number which is equal to the number of lone pairs on the central atom plus the number of atoms bonded to the central.
02:06
So this will be 2 plus 2 equals 4.
02:13
My electron group arrangement is tetrahedral.
02:17
The number of bonded electrons total will be 4.
02:24
The molecular shape is bent and this is polar.
02:30
For my second one i've got sf2.
02:43
The steric number will also be 4.
02:47
This will be tetrahedral.
02:54
Four bonded electrons bent and polar.
03:02
Ni3 number of bonded electrons plus pairs.
03:25
I've got one pair.
03:26
My steric number is 4.
03:29
This is tetrahedral.
03:36
What's this one? number of bonded electrons and i'm assuming that's on the central atom.
03:43
Let me get back over here.
03:46
Number of bonded atoms.
03:49
This should be atoms.
03:52
I did that wrong.
03:55
Number of bonded atoms.
03:58
This is 2, 2 and 3.
04:02
This is trigonal, pyramidal and polar.
04:14
Now let's do our next batch and after s.
04:27
Let's go to sibr4, n2 and co2...