Question

Question attack!! 3 teeny tiny questions concerning isomers, bond angle and shape
helppp please!!

Answer 1

isotope question

Answer 2

I'm on it! =P

Answer 3

yaaaaaay!! :D @Kainui

Answer 4

PH3 angle question

Answer 5

and finally shape question
the most unclear to me one

Answer 6

Alright so first one, how do you think you could figure it out? Here are two possibilities. See if you can draw all 9 out.

Answer 7

hmmm ok let me try

Answer 8

For PH3 what you have to know is how many electrons does Phosphor have in its orbitals by looking at the periodic table so that you can draw its lewis dot structure.

The last one which is planar is also drawing lewis dot structures.

Answer 9

i can come up with this much only

Answer 10

Replace more hydrogens!

Answer 11

okay in PH3
P has 5 electrons in its last shell and 3 of them are involved in bonding with H
so it has 1 lone pair thus i'd expect the angle to be 107

Answer 12

oh can do that??? like replace all H?? i didn't know that >_<

Answer 13

Yeah, the reason it's 107 is simply because if it was a perfectly even bond between each atom like in methane the angle would be 109.5. The lone electron pair takes up a lot of volume since it's not tied up in bonding to another atom and repels the other bonds away causing them to be squeezed together to have a slightly smaller angle.

Answer 14

yes exactly! but why the answer is 104? thats why i got confused T_T

Answer 15

i mean wasnt 104 for 2 lone pairs?

Answer 16

i could come up with 8 only, i'll try finding one more

Answer 17

ummmmm Just a little question what do you mean by Planar?

Answer 18

got all 9 yaaay!!

Answer 19

Awesome. =)

Answer 20

Draw out the structure of PH3 and I'll show you what's going on with it.

Answer 21

okaaay sec

Answer 22

here

Answer 23

So that's one way of drawing it, but can you draw it with the bond lines as a 3D structure like this?