When an electron quickly occupies an strength state increased than its ground state, it is in an excited state. An electron can end up excited if it is given greater energy, such as if it absorbs a photon, or packet of light, or collides with a close by atom or particle.
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The smallest unit of a compound is a molecule, which is made up of atoms held together by bonds.
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the answer would be C of not C is B
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The Sun is the closest star to Earth.
