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Carbon-12

Carbon-12 (12C) is the most abundant of the two stable isotopes of carbon (carbon-13 being the other), amounting to 98. 93% of element carbon on Earth; its abundance is due to the triple-alpha process by which it is created in stars.

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Avogadro constant

The Avogadro constant is a fundamental constant named after the Italian scientist Amedeo Avogadro.

Carbon

Carbon is a chemical element with the symbol C and atomic number 6.

Carbon-14

Carbon-14 is a radioactive isotope of carbon that is commonly used to determine the age of ancient artifacts and archaeological remains.

Electrons

Helium-4

Helium-4 is a stable isotope of the element helium.

Kelvin

Kelvin is a unit of temperature widely used in the scientific field.

Mole (unit)

The Wikipedia page on Mole (unit) provides a detailed explanation of the mole, a unit commonly used in chemistry to measure the amount of a substance.

Nucleosynthesis

Nucleosynthesis is the process that creates new atomic nuclei from pre-existing nucleons (protons and neutrons) and nuclei.