If the chemical symbol consists of more than one letter, any subsequent letters are lowercase. Example: Hydrogen → H, Helium → He 118 Elements and Their Symbols and Atomic Numbers ...

It uses chemical symbols from the periodic table to represent the elements involved. Iron is Fe and oxygen is O. When it’s in the air, oxygen is two atoms joined together, so it’s represented ...

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 ...