Glossary

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Looking for a quick definition?

We’ve got loads of key subject terms in our subject glossaries. There are three ways of finding what you are looking for:

  • First click on the letters of the alphabet to browse for terms.
  • Select a subject from the drop-down menu above to filter the terms by Subject.
  • Or lastly, type the term you are looking for into the search box.

EXAMPLES

Here are some examples of the kinds of definitions you’ll find on this page.

a chemical formula that gives the exact number of different atoms in a molecule .

the sum of the relative atomic masses of the elements that make up the molecule.

an orbital inside a molecule, shared by two atoms.

a group of atoms held together by chemical bonds.

Subject:

a substance that consists of two or more chemically joined atoms.

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