How many energy levels are needed to contain these electrons if an atom of lithium contains 3 electrons?

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How many energy levels are needed to contain these electrons if an atom of lithium contains 3 electrons?

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The energy level is dependent on the number of electrons. The first orbital can hold 2 electrons so 3 electrons requires 2 energy levels/orbitals. This means the 2p orbital will have one electron in it.

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