Question

Which of the following is not an example of an expanded octet?

@hartnn @mathstudent55 @TheSmartOne @Jadeishere @Donblue22 @welshfella @sweetburger @Nnesha @JoannaBlackwelder @ganeshie8 @JFraser

Answer 1

We talked about this one some before. Do you have any thoughts on how to start?

Answer 2

I needed more help on this one thats why I am asking again.
P.S. It was last night and I had no idea about anything you said.
Please lets start again (;

Answer 3

Ok, an expanded octet means more than 8 electrons around the central atom.

Answer 4

Okay (;

Answer 5

Each bond represents 2 electrons.

Answer 6

okay

Answer 7

So, SF6 has 2*6 electrons around the central atom (S).

Answer 8

what does * mean again?

Answer 9

12 electrons around the central atom is an expanded octet so SF6 is and example of an expanded octet.

Answer 10

Times

Answer 11

2*6=12

Answer 12

Make sense so far?

Answer 13

Yep, yep and only yep.

Answer 14

Cool. So, how many electrons do you think are around the central atom of the next one? The NH3?

Answer 15

6

Answer 16

@JoannaBlackwelder

Answer 17

is the next one XeO2?

Answer 18

Wait, you got 6 electrons around the N from the 3 bonds, right?

Answer 19

yep

Answer 20

Ok, good, but notice that there is also a lone pair of electrons on it as well. A lone pair is also 2 electrons.

Answer 21

Oh, the lone pair is those two dots, right?

Answer 22

Right. So, N has 8 electrons around it. That is an octet.

Answer 23

yeah.

Answer 24

Cool, so, the next one is XeO2. How many electrons would the Xe have around it from the bonds?

Answer 25

8 electrons

Answer 26

Good, and how many more from the lone pairs?

Answer 27

4

Answer 28

Nice! So, would that be an octet or expanded octet?

Answer 29

Expanded octet!

Answer 30

Great! :-)

Answer 31

What do you think for the last one?

Answer 32

40 electrons.

Answer 33

hmm..

Answer 34

Thats an expanded octet.

Answer 35

Woah, just look around the central atom. Not all the electrons in the molecule.

Answer 36

Oh okay.

Answer 37

20 electrons.

Answer 38

oops 10 I meant

Answer 39

Right, good! :-)

Answer 40

So, yep, that one would be expanded as well.

Answer 41

So, which wasn't expanded?

Answer 42

NH2

Answer 43

NH3

Answer 44

yeah typos

Answer 45

Thanks for the help @JoannaBlackwelder!

Answer 46

Gotcha. You're welcome. :-)

Answer 47

I have more questions coming whenever I need an answer!

Answer 48

TTFN