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Q. Modern periodic table is based on .......... ?

  • (A) atomic number
  • (B) number of positrons
  • (C) atomic mass number
  • (D) number of neutrons
  • Correct Answer - Option(A)
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  • Filed under category Chemistry
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Explanation by: Admin
The modern periodic table is based on the periodic law: "The chemical properties of elements are a periodic function of their atomic number."

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