There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...

Cal: Right, OK. And what is the chemical symbol for aluminium? Mrs Roberts: So, the chemical symbol is Al. See if you can see it in the periodic table. Cal: OK. It is. It's on the right hand side.

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 ...