All elements have some radioactive isotopes, but these 37 elements have no stable isotopes. These elements are considered the "radioactive elements".| Science Notes and Projects
Get uranium facts. Learn about the properties, uses, biological effects, and sources of element atomic number 92.| Science Notes and Projects
September 22 marks the passing of Frederick Soddy. Soddy was the English chemist who came up with the idea of isotopes. Find out what else occurred today in science history.| Science Notes and Projects
Learn what mass number means in chemistry and how it differs from atomic number and atomic mass. Get examples of how to find the numbers.| Science Notes and Projects
Atomic mass is the mass of a single atom. This tutorial shows the steps needed to calculate atomic mass depending on the type of problem you are working.| Science Notes and Projects
Learn what a proton is, where it's found in the atom, and get interesting facts about protons.| Science Notes and Projects
Get the definition of a neutron in chemistry in physics. Learn interesting facts about neutrons and their role within an atom.| Science Notes and Projects
Learn about deuterium. Get facts about what it is, its properties, uses, and sources. See whether it's radioactive.| Science Notes and Projects
Get facts about tritium, the heaviest hydrogen isotope. Learn about its sources, uses, radioactive decay, and natural abundance.| Science Notes and Projects