Key Stage 3
Meaning
A molecule is a particle made of two or more atoms chemically bonded together.
About Molecules
- A molecule can be shown in a diagram using The Dalton Model of atoms.
- A molecule could be made of many of the same type of atom so it is an element.
- Molecules can be made of many different types of atom and these molecules are called compounds.
Examples
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| This is a molecule of two Nitrogen atoms bonded together making it an element. | This is two Oxygen atoms bonded together into a molecule. | A water molecule is a compound made of one Oxygen bonded with two Hydrogen atoms. | Carbon Dioxide is a compound molecule made of one Carbon atom and two Oxygen atoms bonded together. |
References
AQA
- Molecule, pages 16-7, 64-5, 72-3, 106, GCSE Chemistry; Student Book, Collins, AQA
- Molecule, pages 82, 88-91, GCSE Physics; Student Book, Collins, AQA
- Molecules, pages 5, 38-51, GCSE Chemistry; Third Edition, Oxford University Press, AQA
- Molecules, pages 82-83, GCSE Physics; Third Edition, Oxford University Press, AQA