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Qu'est-ce (qui) est atomic mass - définition
Atomic mass
REST MASS OF AN ATOM IN ITS GROUND STATE
Atomic Mass; Atomic masses; Isotopic mass; Relative isotopic mass; Nuclear mass
The atomic mass (ma or m) is the mass of an atom. Although the SI unit of mass is the kilogram (symbol: kg), atomic mass is often expressed in the non-SI unit dalton (symbol: Da) – equivalently, unified atomic mass unit (u).
atomic mass
REST MASS OF AN ATOM IN ITS GROUND STATE
Atomic Mass; Atomic masses; Isotopic mass; Relative isotopic mass; Nuclear mass
¦ noun the mass of an atom of a chemical element expressed in atomic mass units.
Relative atomic mass
DIMENSIONLESS PHYSICAL QUANTITY: RATIO OF THE AVERAGE MASS OF ATOMS OF AN ELEMENT (IN EACH SAMPLE) TO ONE UNIFIED ATOMIC MASS UNIT. THE UNIFIED ATOMIC MASS UNIT, SYMBOL U, IS DEFINED BEING 1⁄12 OF THE MASS OF A CARBON-12 ATOM
Atomic weight; Atomic Weight; Average atomic mass; Atomic weights; Atomic weight/Table; Atomic wieght; Atomic mass/Table; Standard relative atomic mass; Relative mass
Relative atomic mass (symbol: A) or atomic weight is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant. The atomic mass constant (symbol: m) is defined as being of the mass of a carbon-12 atom.
Exemples du corpus de texte pour atomic mass
1. In the April 21 issue of Physics Review Letters, Wim Ubachs at Vrije Universiteit in Amsterdam and an international group of colleagues explained why they think that this atomic mass ratio may have decreased by 0.002 percent over the past 12 billion years.