118 Elements and Their Symbols and Atomic Numbers:The Periodic Table is a well-organized chart that contains all 118 known ...

Dr. Tim: So this is the periodic table and each letter on it represents a different element. We call these letters symbols. And an element is a pure substance made from only one type of atom.

This is made of aluminium. Aluminium is an element. Now, each element has a chemical symbol made of one or two letters. Cal: Right, OK. And what is the chemical symbol for aluminium? Mrs Roberts ...

Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table’s arrangement also allows scientists to discern trends in ...