Linked Questions

3
votes
2answers
1k views

Is ClH7 possible? [duplicate]

Chlorine can be $sp^3d^3$ hybridized. If so, it can form $\ce{ClH_7}$ and then chlorine, being more electronegative, will have (-7) as its oxidation number. But we know that the oxidation number of $\...
-1
votes
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 ...
22
votes
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 ...
11
votes
1answer
2k views

Why can't phosphorus trifluoride be used as a Lewis acid catalyst in electrophilic substitution of benzene?

Which of the following cannot be used as Lewis acid in the electrophilic substitution of benzene? $\ce{BF3}$ $\ce{SbCl3}$ $\ce{FeCl3}$ $\ce{PF3}$ My Attempt: $\ce{BF3}$ and $\ce{...
7
votes
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, ...
3
votes
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 ...
2
votes
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 ...
0
votes
1answer
5k views

Difference between valency of nitrogen and phosphorus though both have same valence electrons

Both nitrogen and phosphorus have 5 valence electrons, but nitrogen has valency of 3 while phosphorus has valency of 3 or 5. Why is this so? Maybe phosphorus can gain 3 electrons or remove 5 electrons....
0
votes
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 ...
-1
votes
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 ...
4
votes
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 ...
2
votes
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 $\ce{3d}$ ...
1
vote
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 ...
1
vote
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 ...
0
votes
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 ...

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