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An energy level, or energy shell, refers to the fixed distances from the nucleus of an atom where electrons can reside, defined by specific energy states. These levels are quantized, meaning electrons can only occupy certain energy states and must absorb or emit energy to transition between them. Each energy level can hold a specific number of electrons, determined by the formula 2n², where n is the principal quantum number representing the level. The arrangement of electrons in these shells influences an atom's chemical properties and reactivity.

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5d ago

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Where is the shell that has the lowest energy level?

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