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Just to get orbitals "straight"


Garfield

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I´m no chemicist but this "the orbitals get filled one after the other" is a rule of thumb, at most. E.g. the Lanthanides have one 5d electron. After this, the 4f orbital is filled first before the elements continue on with filling the 5d. You should be able to find the electron configuration in any semi-decent periodical table.

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4p < 5s < 4d got missed.

 

Also, note that these are the order of filling orbitals in isolated gaseous atoms (not, for instance, in a crystalline solid, where near-neighbor interactions slightly alter the energy levels).

 

The "order" can be generated from the following two rules :

 

1. An orbital with a lower value of n+l fills first,

2. In case of a tie, the orbital with the lower n fills first.

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g orbitals don't exist in ground-state atoms, only in excited ones. As far as their structure... I wouldn't bother until you get into advanced calculus... or you could look online for some pictures, but the g orbitals themselves (g has NINE suborbitals) have an EXTREMELY COMPLEX three-dimensional arrangement

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