Definition of atomic weight in English:

atomic weight

noun

Chemistry
  • another term for relative atomic mass
    • ‘It has an atomic number of 101 and an approximate atomic weight of 258.’
    • ‘Atoms of an element that have the same atomic number but a different atomic weight are referred to as isotopes.’
    • ‘Hydrogen is the lightest element, so it provides a convenient unit for measuring the relative atomic weights of the other elements.’
    • ‘Finding that the isotopes of neon have atomic weights that are whole numbers vindicated Prout's hypothesis that hydrogen was the basis for all the elements.’
    • ‘The sum of the atomic mass of the protons and neutrons determines the atomic mass or atomic weight of the nucleus.’
    • ‘In general the molecular weight of a molecule is the sum of the atomic weights of its constituent atoms.’

Pronunciation:

atomic weight

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