GIVE SCIENTIFIC REASON
Helium is an inert element
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Helium (He), chemical element, inert gas of Group 18 (noble gases) of the periodic table. ... The second lightest element (only hydrogen is lighter), helium is a colourless, odourless, and tasteless gas that becomes liquid at −268.9 °C (−452 °F).
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The noble gases, in order of their density, are helium, neon, argon, krypton, xenon and radon. They are called noble gases because they are so majestic that, in general, they don't react with anything. For this reason they are also known as inert gases.
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