Atoms, elements and compounds
- Created by: RachelH
- Created on: 16-03-14 14:54
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- Atoms, elements and compounds
- There are about 100 different elements from which all substances are made
- The periodic table is a list of elements
- Each element is made of one type of atom
- Atoms are represented by chemical symbols, e.g. Na for an atom of sodium, O for an atom of oxygen
- The elements in the periodic table are arranged in columns, called groups
- The elements in a group usually have similar properties
- Atoms have a tiny nucleus
- When elements react, their atoms join with atoms of other elements
- Compounds are formed when two or more elements combine together
- Atoms consist of a small nucleus surrounded by electrons
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