HYDROGEN

Hydrogen

Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of, hydrogen is the lightest element and its monatomic form is the most abundant chemical substance, constituting roughly 75% of the Universe's baryonic mass. Non-remnant stars are mainly composed of hydrogen in its plasma state.

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hydrogen

Noun

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


The above text is a snippet from Wiktionary: hydrogen
and as such is available under the Creative Commons Attribution/Share-Alike License.

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