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Word: hydrogen (lookup usage) (lookup stats)


Meaning:

Noun:

  • An atom of the element.
  • A sample of the element.
  • Molecular hydrogen (H2), a colourless, odourless and flammable gas at room temperature.
  • The lightest chemical element (''symbol'' H) with an atomic number of 1 and atomic weight of 1.00794.

Source: Wiktionary | Src Info »