Q.

For the energy levels in an atom which one of the following statement is correct ?

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a

The 4s sub-energy level is at a higher energy than the 3d sub-energy level

b

The M-energy level can have maximum of 32 electrons

c

The second principal energy level can have four orbitals and contain a maximum of 8 electrons

d

The 5th main energy level can have maximum of 49 electrons

answer is C.

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Detailed Solution

for n = 2,2s,                 2p     1          +        3           = 4 orbitals2           +       6           = 8 electronsIt has 4 orbitals and contains 8 electrons.Note:  For a given value of n ,Number of orbitals = n2Number of electrons = 2n2
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