The Hydrogen atom has three isotopes: Protium, Deuterium, and _____________.

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Tritium

Notatum

Helium

Titanium

answer is B.

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Detailed Solution

The Hydrogen atom has three isotopes of the element hydrogen: hydrogen or protium, deuterium, and tritium. They each have one single proton (Z=1) but differ in the number of neutrons.

Hydrogen has no neutrons, deuterium has one, and tritium has two neutrons. The isotopes of hydrogen have, respectively, mass numbers of one, two, and three.

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