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Helium
/ˈhiːli.əm/
The second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.
📖 Definitions of "Helium"
noun
- 1
The second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.
- 2
A form or sample of the element.
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