Elements are represented by chemical symbols, and the symbols for the elements can be found on the periodic table. For example, hydrogen is represented by the chemical symbol, H, and helium is represented by the symbol He.

Interactive exercise. Assistance may be required. Elements bond together like the example below.

How do we represent this compound? To represent compounds or substances, we use a chemical formula.

Video segment. Assistance may be required. Watch this video for a brief introduction to chemical formulas.

Source: Chemical formulas, Powerof10Texas, YouTube