Q29 / 180 · COMEDK 2016 · Chemistry

The elements with atomic numbers $9,17,35$, 53,85 are all

  • A
    heavy metals
  • B
    light metals
  • C
    noble gases
  • Correct answer
    D
    halogens

Solution

The elements with atomic number $9,17,35,53$ and 85 are all halogens, they have electronic configuration of $n s^{2} n p^{5}$.

Hence, the correct answer is option: 'D'.

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