Atoms, Compounds, Elements and Chemical symbols.

Atoms

• Everything is made from atoms, including you.
• Atoms are tiny particles that are far too small to see, even with a microscope.
• We often draw atoms as circles, to make drawing diagrams simpler.

Elements

• There are over a hundred different elements.
• The atoms in a particular element are the same as each other, and they are different from the atoms of all other elements. For example, lead and gold are elements. A piece of pure gold contains only gold atoms. A piece of pure lead contains only lead atoms.
• The atoms of some elements do not join together, but instead they stay as separate atoms.
• The atoms of other elements, such as hydrogen and oxygen, join together to make molecules.

Compounds

• A compound is a substance that contains atoms of two or more different elements, and these atoms are chemically joined together.
• There are very many…