1. Carbon-12Carbon-12 is the more abundant of the two stable isotopes of the element carbon, accounting for 98.89% of carbon; it contains 6 protons, 6 neutrons, and 6 electrons. Its abundance is due to the Triple-alpha process by which it is created in stars. Carbon-12 is of particular importance as it is used as the standard from which atomic masses of all nuclides are measured: its mass number is 12 by definition.
Read “Carbon-12” on English Wikipedia
Read “炭素12” on Japanese Wikipedia
Read “Carbon-12” on DBpedia
Read “Carbon-12” on English Wikipedia
Read “炭素12” on Japanese Wikipedia
Read “Carbon-12” on DBpedia
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