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Earlier discussion
2 older comments kept for context.
CHUKA MIKE
Deuterium (or hydrogen-2, symbol 2
H
or
D
, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium, or hydrogen-1). The nucleus of a deuterium atom, called a deuteron, contains one proton and one neutron, whereas the far more common protium has no neutrons in the nucleus. Deuterium has a natural abundance in Earth's oceans of about one atom in 6420 of hydrogen. Thus deuterium accounts for approximately 0.02% (0.03% by mass) of all the naturally occurring hydrogen in the oceans, while protium accounts for more than 99.98%. The abundance of deuterium changes slightly from one kind of natural water to another (
Oluwaseun Adeyemi
Isotopes of hydrogen are: protium (hydrogen), deuterium, and tritium