Select the correct answer from each of the following questions: For the energy levels in an ato...

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Select the correct answer from each of the following questions:

For the energy levels in an atom, which one of the following statement is correct?
(A) There are seven principal electron energy levels
(B) The second principal energy level has four orbitals and contains a maximum of eight electrons
(C) The second principal energy level has four orbitals and contains a maximum of eight electrons
(D) The \( 4 s \) sub-energy level has higher energy than \( 3 d \) sub-energy level.
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