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Why do atoms give off light?

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Why do atoms give off light?

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Atoms give off light under several circumstances, most commonly when they emit electromagnetic radiation and also when their electrons go from a higher energy level to a lower. While some of this light will be in the visible spectrum, some may also fall outside the range of human sight.Electron ShellsScientists have improved on the atomic model over the years and have discovered that electrons do not orbit the nucleus of an atom like planets around a sun. Instead, they surround the atom in a cloud that contains numerous energy levels. When they are in their normal state, electrons are in lower levels closer to the nucleus.Adding EnergyAdding energy will cause the electrons to temporarily move from the shell space they currently occupy to a higher level by absorbing some of the energy. When they fall back to their usual level or levels, they give off this absorbed energy in the form of light. This light will produce spectra unique to each atom and molecule.Electromagnetic RadiationAll o

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