The energy levels in an atom, Chemistry

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For the energy levels in an atom, which one of the following statements is correct:

(1) There are seven principal electron energy levels

(2) The second principal energy level can have four sub-energy levels and contains a maximum of eight electrons

(3) The energy level can have maximum of 32 electrons

(4) The sub-energy level is at a higher energy than the sub-energy level

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

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