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    Can someone explain the principal quantum number to me please? We had a lesson it today but I'm not getting it :-/
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    (Original post by KyleH123)
    Can someone explain the principal quantum number to me please? We had a lesson it today but I'm not getting it :-/
    It is just the number given to the energy level of the electrons around the atom.

    The first energy level is assigned a quantum number = 1
    The second energy level is assigned a quantum number = 2
    etc.
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    (Original post by charco)
    It is just the number given to the energy level of the electrons around the atom.

    The first energy level is assigned a quantum number = 1
    The second energy level is assigned a quantum number = 2
    etc.
    Thank you Charco!
 
 
 
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