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Early attempts at classifying elements - class-IX

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Multiple Choice

The first periodic law stated by Mendeleev was :

  1. there is no correlation in the properties and atomic weights of the elements
  2. the properties of the elements are a periodic function of their atomic numbers
  3. the properties of the elements are a periodic function of their atomic weights
  4. the properties of the elements are a periodic function of their empirical formula
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