For example, \(CO_2\) is the formula for carbon dioxide. It tells you that each molecule has one carbon atom and two oxygen atoms. Take care when writing these formulae. The small numbers go at ...

Let students know that each group should have 4 white, 3 red, 2 black, and 1 blue cube. The white ones stand for hydrogen, the red are oxygen, the black are carbon, and the blue is nitrogen. Explain ...

A molecule is made up of a certain number and type of atom. For example, water (H 2 O) is always made from two hydrogen atoms and one oxygen atom. All water molecules have this combination of atoms. A ...