Which is the most abundant isotope of hydrogen?

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Multiple Choice

Which is the most abundant isotope of hydrogen?

Explanation:
Hydrogen’s isotopes differ by the number of neutrons in the nucleus. The form with no neutrons, protium, is the most common in nature, making up the vast majority of hydrogen atoms (about 99.98%). Deuterium, with one neutron, and tritium, with two neutrons and radioactive, are far less common. Because abundance is about how much of the natural sample is this isotope, protium is the most abundant form of hydrogen.

Hydrogen’s isotopes differ by the number of neutrons in the nucleus. The form with no neutrons, protium, is the most common in nature, making up the vast majority of hydrogen atoms (about 99.98%). Deuterium, with one neutron, and tritium, with two neutrons and radioactive, are far less common. Because abundance is about how much of the natural sample is this isotope, protium is the most abundant form of hydrogen.

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