Neon
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Neon is a chemical element, having the chemical symbol Ne. Its atomic number (the number of protons) is 10. It has a standard atomic weight of 20.179 g•mol −1, and is typically found as a gas in its elemental form.
Neon is considered to be a member of the " " class of element. At a pressure of 101.325 kPa, it has a boiling point of −246.08 °C, and a melting point of −258.59 °C