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energy level

energy level

4 4.5
A fixed amount of power that an electron in an atom can have
  • noun
  • /ˈɛnərdʒi ˈlɛvəl/
  • Specialized
translation icon : nivel de energía
  • To test his theory fully, it was necessary to know the actual pattern of energy levels for each chemical element.
  • discrete energy levels
  • energy levels in an atom
  • higher energy level

Whereas nuclei themselves have energy levels and can wobble.

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Examples

  • As shown in figure 2a, a sufficiently energetic solar photon excites an electron from a valence-band energy level to a conduction-band level.

    Academic text (2012)
  • When an electron transitions between energy levels, it emits or absorbs a photon, resulting in light.

  • It's split into N energy levels, right.

  • It's just it's, you know, the energy levels are way, way out of the range where I would be worried about this.

  • And at the atomic level, the energy levels are much higher.

  • As they change, the energy levels evolve.

  • Be aware of your body's energy level, and take a break when you feel exhausted.

    Blog text (9)
  • When n is about 0.5, the two lowest energy levels are well separated from the other levels.

    Academic text (2005)
  • Infrared absorption gives information about the energy level structure of the conduction electrons.

    Academic text (1994)
  • In fact, individual photons can be emitted or absorbed when electrons change energy levels around the atoms.

Synonyms

energy state
vsenergy level
  • Specialized
2 6.5

A fixed level of energy a tiny thing like an atom can have

is the general physics term for the same stable energy value

How High

energy level
  • Specialized
4 4.5
ground state
  • Specialized
1 6.1

Surface Forms

energy level singular
energy levels plural

Morphology

energy + level

The sense 'general atmosphere, mood, or liveliness' is directly and predictably built from 'energy' (vigor, liveliness) plus 'level' (amount or degree), so a learner who knows both words can infer this compositional meaning. The construction 'X level' meaning the amount/degree of X is a common, cross-linguistic pattern and thus readily accessible to a B1 learner.

Etymology

Energy level comes from a picture of electrons standing on flat 'steps' around an atom; each level is like a step where an electron can have a certain amount of energy. That's why the term means a specific, stable amount of energy an electron or system can have.