英语词汇“energy level”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	energy level
释义	energy level noun Physics The fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have.This means that an atom with eight electrons in its outermost energy level is very stable.... An electron in a lower energy level is both closer to the nucleus and has fewer electrons between itself and the nucleus. When an electron falls from a higher energy level to a lower energy level, a photon is given off.
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