T

Tina Singh • 10.85K Points
Tutor II Chemistry 

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)
Explanation by: Tina Singh 
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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