2.1.2

Chemical Formula

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Compounds

Atoms of different elements can be combined together to create compounds. Compounds have formulae that are made by combining the chemical symbols of the elements that combine to make them.

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Different compounds

  • Combining different atoms creates different compounds. There are a lot of combinations that can be created.
  • A compound contains at least 2 different elements.
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Lego

  • Compounds are a bit like lego. Different combinations of bricks results in different models. Similarly, different combinations of atoms results in different compounds.
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E.g. sodium oxide

  • Combining sodium (Na) atoms and oxygen (O) atoms produces sodium oxide.
  • We can represent this compound by combining the chemical symbols of the 2 elements (Na and O) to create the chemical formula Na2O.

Jump to other topics

1States of Matter

2Elements, Compounds & Mixtures

3Atomic Structure

4The Periodic Table

5Chemical Formulae, Equations & Calculations

6Bonding

7Electrolysis

8Groups of the Periodic Table

9The Atmosphere

10Reactivity Series

11Metal Extraction

12Acids & Alkalis

13Chemical Tests

14Physical Chemistry

15Organic Chemistry

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