Where are good conductors generally found on the periodic table? The two most common alkaline earth metals are Which alkaline earth metal is radioactive? Where is sodium on the periodic table? Where is radon on the periodic table? How reactive are alkaline earth metals?
The periodic table is a chart that lists and organizes elements based on their chemical characteristics. Elements are the chemically pure substances that are made of only one type of atom, and they make up all matter in the universe.