The First Drop
posted by kiRk at 12:54 AM
Carbon-12 is the most abundant (98.89%) of the two stable isotopes of the element carbon. It contains 6 protons, 6 neutrons and 6 electrons. Carbon-12 is of particular importance as it is used as the standard from which all other isotopes' atomic weight is measured and thus the measurement of Avogadro's number.
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