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.

Subject:

(N0) all the natural positive numbers, together with zero. N0 = {0; 1; 2;...

drawing a line in the diagram of a molecule to indicate where electrons are shared.

a bond formed when non-metal atoms share a pair of valence electrons to form a molecule.

a solid network of atoms making up a large crystal with covalent bonds between the atoms.

a method used to refine petrol by breaking covalent bonds between carbon atoms using heat and a...

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