Atoms, elements and compounds

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  • 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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