what is helium??????
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Explanation:
Helium is composed of two electrons in atomic orbitals surrounding a nucleus containing two protons and (usually) two neutrons. As in Newtonian mechanics, no system that consists of more than two particles can be solved with an exact analytical mathematical approach (see 3-body problem) and helium is no exception.
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Answer:
A very light colourless gas that does not burn ofent used to fill object that float in the air.
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