Question

Which of the following is an isotope of Hydrogen?

• A. Deuterium, Protium
• B. Deuterium, Tritium
• C. Deuterium, Tritium and Protium
• D. Protium

Answer 1

The correct option is C

Deuterium, Tritium and Protium

The explanation for the correct answer

(C)Deuterium, Tritium and Protium

1. Isotopes are the elements having the same atomic number but different mass numbers.
2. Hydrogen has three isotopes that are Protium ${}_1{}^1\mathrm{H}$, Deuterium ${}_1{}^2\mathrm{H}$ , and Tritium ${}_1{}^3\mathrm{H}$.
3. Protium has atomic number 1 and mass number also 1u.
4. Deuterium has atomic number 1 and mass number 2u.
5. Tritium has atomic number 1 and mass number 3u.

Deuterium, Tritium, and Protium are the three isotopes of hydrogen. Hence, option C is correct.