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Help with AS level chemistry question

Ytterbium,Atomic number 70 , is the first element in the periodic table to have the first four shells full.

How many orbitals are there in the third shell of Ytterbium.
Original post by ihaveno name
Ytterbium,Atomic number 70 , is the first element in the periodic table to have the first four shells full.

How many orbitals are there in the third shell of Ytterbium.

have you learnt about orbitals and sub shells yet?
Reply 2
Original post by username10190205

have you learnt about orbitals and sub shells yet?


Yes I just don’t understand how they got the answer as 9
Original post by ihaveno name
Yes I just don’t understand how they got the answer as 9


Hope this diagram can help.

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