MCQ
Similarity in chemical properties of the atoms of elements in a group of the Periodic table is most closely related to
  • atomic numbers
  • B
    atomic masses
  • C
    number of principal energy levels
  • D
    number of valence electrons

Answer

Correct option: A.
atomic numbers
a
If elements are arranged in order of their increasing atomic numbers, element coming at intervals of $2, 8, 8, 1 8, 1 8, 32$ and $32$ will have similar physical and  chemical properties and thus grouped in one particular group.

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