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For the energy levels in an atom , whic...

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

A

There are serven principle electron energy levels

B

The second principle energy levels has four sub-energy levels and contain a maximum of right electron

C

The principle energy levels N cn have a maximum of `32` electrons

D

The`4s`sub energy level has hight energy than `3d` subenergy level

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The correct Answer is:
C
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