Question

Which of the following isotopes make heavy water?

• A. ${}_1{}^1\mathrm{H}$
• B. ${}_1{}^2\mathrm{H}$
• C. ${}_1{}^3\mathrm{H}$
• D. both (b) and (c)

Answer 1

The correct option is B

${}_1{}^2\mathrm{H}$

The explanation for the correct option

• Heavy water is a compound that is made up of oxygen and deuterium, a heavier isotope of hydrogen which is denoted by ‘${}_1{}^2\mathrm{H}$’ or ‘D’.
• Heavy water is also called deuterium oxide and is denoted by the chemical formula D₂O
• Option b is correct.