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Which of the following describes the Aufbau principle?
a) each electron is added to the lowest energy level orbital available
b) none of the above
c) the lowest energy configuration for an atom is the one with maximum number of unpaired electrons
d) no 2 electrons in the same atom can have the same set of 4 quantum numbers.​

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batolisis

The statement that describes the Aufbau principle is ; ( A ) each electron is added to the lowest energy level orbital available

The Aufbau principle states that at ground level of an atom/ion the orbitals of the lowest energy levels of the atom are first filled up by electrons.  therefore

It can be said that each electron is added to the lowest energy level orbital available before electrons will be added to orbitals with higher energy levels.

Hence we can conclude that The statement that describes the Aufbau principle is each electron is added to the lowest energy level orbital available

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