noun
energy level
Technical term in physics and chemistry for the discrete energy states of a quantum system, such as electrons in an atom.
電子は特定のエネルギー準位に存在する。
Electrons exist in specific energy levels.
エネルギー帯 (energy band) refers to a range of energy levels in solids, while エネルギー準位 is a single discrete level.
Compound of エネルギー (energy, from German Energie) and 準位 (level, rank), a calque of English 'energy level'.