• Energy levels are fixed distances from the nucleus of an atom where electrons may be found.
  • Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center.
  • Energy levels are a little like the steps of a staircase.
  • You can stand on one step or another but not in between the steps.
  • The same goes for electrons.
  • They can occupy one energy level or another but not the space between energy levels.
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