Using what you know about the particles that make up an atom, compare and contrast stable atoms, atoms of different elements, and isotopes. Must be at least 3 sentences.

An atom is the smallest unit of matter that retains all of the chemical properties of an element. Atoms combine to form molecules, which then interact to form solids, gases, or liquids. For example, water is composed of hydrogen and oxygen atoms that have combined to form water molecules. Many biological processes are devoted to breaking down molecules into their component atoms so they can be reassembled into a more useful molecule.

Explanation:

Hope this helps!