The formula H₂O shows that water is made from two atoms of hydrogen (H) bonded to one atom of oxygen (O). Katie: Time for some science. And today it's a chemistry classic, the periodic table.

Achieve a common language of chemistry by educating its practitioners Facilitate the interaction of chemists to implement appropriate chemical representations Advocate for the use of a common language ...

But sometimes the symbol comes from a name for the element ... chemically joined together. Compounds form in chemical reactions, and you need other chemical reactions to separate a compound ...