In an orbital ,three electrons can't be filled ,why?

1.	In an orbital ,three electrons can't be filled ,why?
Answer» tion:The spin number proves that there are only 2 kinds of spin either clockwise or ANTI clockwise. If the third ELECTRON has to be filled there is no POSSIBILITY of getting a NEW spin. That is the reason why maximum 2 electrons are filled in an orbital and minimum of zero electron (2ND excited stage) are filled.

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