# Linked Questions

1answer
10k views

### Why does Sulfur have 12 valence electrons in the Sulfate ion? [duplicate]

So I am completely and utterly confused about why sulfur has 12 valence electrons. I understand in it's configuration, it has 2 electrons for the 3s subshell, and 4 electrons from its 3p subshell, and ...
1answer
774 views

### Number of bonds in a Lewis Structure [duplicate]

I'm asked to find the Lewis Structure of sulfuric acid, $SO_4H^-$. After struggling for a while, I sumply looked it up. How can this be? Sulfur has 6 electrons in its valence shell, so it should ...
2answers
2k views

### Why are covalent bonds formed? [duplicate]

As far as I know, -covalent bonds are formed because atoms are unstable -unfilled valence electrons -want to fill up their outer rings and become stable BUT, why does compounds like ClF3 exist? Why ...
0answers
101 views

### Is it okay for a sulfite ion to have 10 electrons around the sulfur? [duplicate]

Possible Duplicate: Can an atom have more than 8 valence electrons? If not, why is 8 the limit? I was watching this youtube clip ( http://www.youtube.com/watch?v=XY1XLgHUAIQ ) in which a lewis ...
8answers
30k views

### Why do compounds like SF6 and SF4 exist but SH6 and SH4 don't?

Both $\ce{SF6}$ and $\ce{SH6}$ and $\ce{SF4}$ and $\ce{SH4}$ have the same central atom and the same hybridization, but my teacher specifically mentioned that $\ce{SH6}$ and $\ce{SH4}$ don't exist. I'...
5answers
8k views

### Can fluorine act as the central atom in interhalogen compounds?

Why can't fluorine be the central atom in inter-halogen compounds? A $\ce{F-F}$ bond is weaker than a $\ce{F-X}$ bond and thus, fluorine should be happy to form inter-halogen compounds. But, why ...
2answers
5k views

### Which relatively simple molecules violate the octet rule?

I'm learning how to draw Lewis diagrams. Everything I've read emphasizes the octet rule. However, to the best of my knowledge, that rule only applies to elements in the first three periods. On our ...
3answers
26k views

### How to get the valencies of elements?

How to find the valencies of elements by using its distribution of electrons? Please explain the method in simple words. Do you have to study the valencies or is there a simple way of remembering? PS:...
2answers
876 views

### How should elements be colored? And how many bonds does an atom have?

I'm working on my own 3D molecule viewer for my AP Chem class. So far everything's going together nicely. There's a couple of things I'm not sure about though... Is there a certain rule of thumb or ...
1answer
5k views

### Why are atoms with eight electrons in the outer shell extremely stable?

Atoms that have eight electrons in their outer shell are extremely stable. It can't be because both the $s$ and the $p$ orbitals are full, because then an atom with 13 or 18 valence electrons would be ...
1answer
2k views

### What is the highest possible expanded octet?

Often called "hypervalent", chemicals like phosphorous pentachloride and sulfur hexafluoride are possible due to the fact that their central atoms form covalent bonds with more than four other atoms, ...
1answer
2k views

1answer
1k views

### Can d-orbitals participate in bonding?

My textbook says: It is appropriate to remark that the trick of rationalizing apparent violations of the octet rule by invoking the participation of d-orbitals in the bonding scheme is a matter of ...
1answer
649 views

### Lewis dot structures and exceeding the octet

I'm confused about the octet rule. As far as I understand, you need to complete the valence shell of the elements by sharing electrons. Now, carbon has 6 electrons which means it has 4 valence ...
0answers
1k views

### Why are electron configurations more stable when there are 8 electrons in the outer shell? [duplicate]

In this video on Khan Academy, Sal remarks that 'all atoms envy the noble gases, which are the most stable because they have eight electrons in their outer shell'. I can't think of much of a reason ...
0answers
1k views

### Why are d orbitals used in the hybridisation of PCl5 and similar compounds? [duplicate]

Phosphorus uses its $\ce{3s}$, three $\ce{3p}$ and one $\ce{3d}$ orbitals for its hybridization in $\ce{PCl5}$ and similar compounds. However, shouldn't it use its $\ce{4s}$ rather than $\ce{3d}$ ...
0answers
160 views

### Valence shell expansion and sulfur

I've been searching some things regarding the ability of sulfur to accomodate negative charge and reached the conclusion that it's due to its size and its ability to expand its valence shell. I can't ...
0answers
39 views

### Is Octet Expansion appropriate when regular Octet bonding is possible (such as using dative bonds)?

I was taught to use Occam's razor whenever in doubt over an octet expansion, being told it never happened when, for example, dative bonds could resolve the issue with a regular octet. This seems to ...