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Carbon-12 - History | | Carbon-12 - History: Encyclopedia II - Carbon-12 - History | | Prior to 1959 both the IUPAP and IUPAC tended to use used oxygen to define the mole, the chemists defining the mole as the number of atoms of oxygen which had mass 16 g, the physicists using a similar definition but with the oxygen-16 isotope only. The two organizations agreed in 1959/1960 to define the mole as:
This was adopted by the CIPM (International Committee for Weights and Measures) in 1967, and in 1971 it was adopted by the 14th CGPM (General Conference on Weights and Measures).
In 1980 the CIPM clarified the above definition, defining that the carbon-12 atoms are unbound and ...
See also:Carbon-12, Carbon-12 - History | | | Carbon-12, Carbon-12 - History, Carbon, Carbon-14, Isotopes of carbon, Mole (unit) | | |
| | | Carbon-12: Encyclopedia II - Carbon-12 - History
Carbon-12 - History
Prior to 1959 both the IUPAP and IUPAC tended to use used oxygen to define the mole, the chemists defining the mole as the number of atoms of oxygen which had mass 16 g, the physicists using a similar definition but with the oxygen-16 isotope only. The two organizations agreed in 1959/1960 to define the mole as:
This was adopted by the CIPM (International Committee for Weights and Measures) in 1967, and in 1971 it was adopted by the 14th CGPM (General Conference on Weights and Measures).
In 1980 the CIPM clarified the above definition, defining that the carbon-12 atoms are unbound and in their ground state.
Other related archives1959, 1960, 1967, 1971, 1980, Avogadro's number, CGPM (General Conference on Weights and Measures), CIPM (International Committee for Weights and Measures), Carbon, Carbon-14, IUPAC, IUPAP, Isotopes of carbon, Mole (unit), atomic weight, carbon, electrons, ground state, isotopes, neutrons, oxygen, protons
 Adapted from the Wikipedia article "History", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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