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  • Created by: simonhw
  • Created on: 06-02-16 19:52
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  • Döbereiner
    • Döbereiner's theory was called the 'Law of Triads'
      • This claimed that the appearance and reactions of elements in a triad were similar to each other
      • It was one of the first attempts to order the elements in some way
    • Döbereiner realised that the atomic mass of the middle element was close to the average of the atomic masses of the two other elements
      • Scientists then realised how important atomic masses were when ordering elements
    • Döbereiner also ordered the elements based on the similarity of their chemical properties
      • For example: lithium, sodium and potassium all...
        • React with water at room temperature
        • React with chlorine to form similar compounds
        • Combine with hydrogen to form similar compounds
        • Form hydroxides with similar formulas


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