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(physics) The most abundant of the two stable isotopes of carbon, ¹²₆C, having six protons and six neutrons; it is the standard for atomic weight and is used to define the mole.
Carbon-12 – 98.93% – 12 Da – 0 – 0.0 keV – 92161.753±0.014 keV – 12N – 12B.
The Hoyle state and possible decay ways
