Chemistry, 13.10.2019 22:10 ana5246

What does the period number tell about the energy levels are occupied by the electrons in an atom?

a-the period number tell us how many electrons are in the highest energy level of the atom
b-the period number tell us how many electrons are in each sub level of the atom
c-the period number tells how many energy sub levels are occupied in the atom
d-the period number tells which is the highest energy level occupied by the electrons

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What does the period number tell about the energy levels are occupied by the electrons in an atom?...