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Definition of energy level in US English: energy levelnoun Physics The fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have. Example sentencesExamples - This higher energy level allows X-ray beams to pass straight through most of the soft material in the human body.
- An electron in a lower energy level is both closer to the nucleus and has fewer electrons between itself and the nucleus.
- For instance, photons will share a particular energy level in a laser.
- When an electron falls from a higher energy level to a lower energy level, a photon is given off.
- This means that an atom with eight electrons in its outermost energy level is very stable.
Definition of energy level in US English: energy levelnoun Physics The fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have. Example sentencesExamples - This higher energy level allows X-ray beams to pass straight through most of the soft material in the human body.
- When an electron falls from a higher energy level to a lower energy level, a photon is given off.
- An electron in a lower energy level is both closer to the nucleus and has fewer electrons between itself and the nucleus.
- This means that an atom with eight electrons in its outermost energy level is very stable.
- For instance, photons will share a particular energy level in a laser.
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