Relative atomic mass

Frae Wikipedia, the free beuk o knawledge
Jump to navigation Jump to search
The atomic nummer o hydrogen is 1. The staundart atomic wicht o hydrogen is 1.008 (this value is nae gien here as an expectation interval, as it is in elements ablo). Atomic wicht is the same as relative atomic mass. The atomic wichts o samples o hydrogen will vary accordin tae thair content o hivy hydrogen (deuterium), an this will in turn depend upon whaur the samples are collectit.

Relative atomic mass (symbol: Ar) is a dimensionless pheesical quantity, the ratio o the average mass o atoms o an element (frae a single gien sample or soorce) tae ​112 of the mass of an atom of carbon-12 (known as the unified atomic mass unit).[1][2]

References[eedit | eedit soorce]

  1. International Union of Pure and Applied Chemistry (1980). "Atomic Weights of the Elements 1979". Pure Appl. Chem. 52 (10): 2349–84. doi:10.1351/pac198052102349.
  2. Internaitional Union o Pure an Applee'd Chemistry (1993). Quantities, Units and Symbols in Physical Chemistry, 2nt edeetion, Oxford: Blackwell Science. ISBN 0-632-03583-8. p. 41. Electronic version.