Atoms, Compounds, Elements and Chemical symbols.

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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…

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