hydrogen
/ˈhaɪdɹəd͡ʒ(ə)n/
The lightest chemical element, with an atomic number of 1 and atomic weight of 1.008; The lightest chemical element, with an atomic number of 1 and atomic weight of 1.008.; An atom of this element; Molecular hydrogen (sense 1
- plural
- hydrogens
Meanings
- 1
The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008
Hydrogen is the lightest element.
Tatoeba · marcelostockle · CC BY 2.0 FR
Hydrogen and oxygen combine to form water.
Tatoeba · CK · CC BY 2.0 FR
- 2
The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.; An atom of this element
- 3
Molecular hydrogen (sense 1; symbol H₂), a colourless, odourless and flammable gas at room temperature
- 4
Molecular hydrogen (sense 1; symbol H₂), a colourless, odourless and flammable gas at room temperature.; A molecule of this molecular species
- 5
Synonym of protium (“the lightest and most common isotope of hydrogen (sense 1; symbol H, ¹H, or 11H), as contrasted with deuterium and tritium”)rare