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

For the energy levels in an atom, which one of the following statement(s) is (are) correct ?

A

There are seven principal electron energy levels

B

The second principal energy level can have four sub-energy levels and contain a maximum of eight electrons

C

The M energy level can have a maximum of 32 electrons

D

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

Text Solution

Verified by Experts

The correct Answer is:
A, D
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