Definition of energy level in English:

energy level

Syllabification: en·er·gy lev·el


The fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have.
More example sentences
  • 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.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day oleaginous
Pronunciation: ˌōlēˈajənəs
rich in, covered with, or producing oil; oily