Why don't electrons not emit radiation in specific energy levels?

1.	Why don't electrons not emit radiation in specific energy levels?
Answer» ns AROUND a nucleus are not a classical problem but CONSERVATION of energy holds also in the QUANTUM states. The electron around a nucleus is in a quantized energy level and can change it only if an external interaction intervenes... Therefore an electron in its ground state cannot EMIT energy.

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Why don't electrons not emit radiation in specific energy levels?

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