Chemistry

Chemistry, 16.09.2019 10:30, nireegnu

When excited electrons cascade to lower energy levels in an atom a)visible light is always emitted b)the potential energy of the atom increases c)the electrons always fall back to the first energy level d)the electrons fall indiscriminately to all levels e)the electrons fall back to a lower unfilled energy level

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Biology, 06.10.2019 18:40, umezinwachukwuebuka1

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