(Q556)

English

hydrogen

chemical element with symbol H and atomic number 1; lightest and most abundant chemical substance in the universe

  • H
  • element 1
  • protium

Statements

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Hydrogen discharge tube.jpg
3,000 × 1,000; 274 KB
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1.008 dalton
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Atomic weights of the elements 2009 (IUPAC Technical Report) (English)
8 February 2020
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2.2
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Hydrogen
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Hydrogen
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Identifiers

553.92
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546.21
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Hydrogen
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hydrogen
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