It weighs 13.6 times more than water in equal volumes ... They are called 'heavy' because of their atomic number and mass number. In their atomic structure, they have more protons and neutrons ...

Heavy water is a form of water with a unique atomic structure and properties coveted for the production of nuclear power and weapons. Like ordinary water—H 2 0—each molecule of heavy water ...

Accompanying Lesson Plan: Lesson 3.2: Finding Volume—The Water Displacement Method The chart shows that atomic size and mass for the first 20 elements in the periodic table. The size of the atoms and ...