📊 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: (A) atomic number

Explanation: The modern periodic table is based on the periodic law: "The chemical properties of elements are a periodic function of their atomic number."

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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