The correct answer is: B. It uses Deuterium, a heavier isotope of hydrogen, rather than Protium.
Heavy water is water that contains a higher than normal proportion of the heavy isotope of hydrogen, deuterium. It is also called deuterium oxide. The chemical formula of heavy water is $D_2O$, while the chemical formula of normal water is $H_2O$.
Heavy water is denser than normal water because the deuterium atom is heavier than the hydrogen atom. The density of heavy water is 1.107 grams per cubic centimeter, while the density of normal water is 0.997 grams per cubic centimeter.
Heavy water is not used by heavy industries such as steel, chemicals, etc. It is used in nuclear reactors as a moderator and coolant. It is also used in research and medical applications.
Here is a brief explanation of each option:
- Option A: Heavy water is not three times denser than normal water. The density of heavy water is 1.107 grams per cubic centimeter, while the density of normal water is 0.997 grams per cubic centimeter.
- Option B: Heavy water uses deuterium, 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube