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Chemistry 12 Online
OpenStudy (leahhhmorgannn):

Carbon has an atomic number of 6, but the following orbital notation for carbon is incorrect. Explain the error in terms of the rules for electron arrangements. http://prntscr.com/8uh3tu I know it's wrong according to Hund's rule, but I'm not sure WHY it's wrong according to that. I also have no idea how to read these orbital notations, so it would help if I knew how to do that.

ganeshie8 (ganeshie8):

you may think of electron-electron repulsions to get a feel of why two electrons cannot occupy the same orbital when other orbitals are empty

ganeshie8 (ganeshie8):

what does Hund's rule say ?

OpenStudy (leahhhmorgannn):

my problem is that the orbital notation doesn't even look incorrect to me based on what my lessons taught me.

ganeshie8 (ganeshie8):

How many orbitals do you see in the given diagram ?

OpenStudy (leahhhmorgannn):

Hund's rule basically states that orbitals are each occupied by one electron before any orbital will attain a second electron.

OpenStudy (leahhhmorgannn):

1s, 2s, and 2p are all orbitals, right? so 3 orbitals?

ganeshie8 (ganeshie8):

Nope. \(p\) is a subshell, it contains \(3\) orbitals : \(p_x, p_y, p_z\). In your diagram, each square box represents an orbital. Count the number of square boxes again, how many orbitals do we have ?

OpenStudy (leahhhmorgannn):

5?

ganeshie8 (ganeshie8):

right, fist lets get the terminology straight : shell subshell orbital do you what they are, or how to think of them ?

OpenStudy (leahhhmorgannn):

http://chemistry.stackexchange.com/questions/18466/difference-between-shells-subshells-and-orbitals I did some looking and found this

ganeshie8 (ganeshie8):

good, just for practice try answering this how many shells are there below, can you point them ? |dw:1445618660035:dw|

OpenStudy (leahhhmorgannn):

From what my mom is telling me, 1 would be a shell and s would be its subshell. 2 would be a shell, s and p are its subshells. So 2 shells? 1 and 2?

ganeshie8 (ganeshie8):

Perfect! below are the 2 shells : |dw:1445618934553:dw|

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