How many maximum number of electrons can be with quantum number n =3 and l =2 ?

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Explanation: 

The maximum number of electron can be determined with azimuthal quantum number l 

here l = 2

when l = 2 , it means d orbital

in d orbital there are maxiumum 10 electrons .So, in this quantum number with n = 3 and l = 2

3d there can be maximum 10 electrons

Answer: 

there can be maximum 10 electrons