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COMEDK2016ChemistryClassification of Elements and Periodicity in Properties

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

Options

  1. Aheavy metals
  2. Blight metals
  3. Cnoble gases
  4. Dhalogens

Correct answer

D. halogens

Step-by-step solution

The elements with atomic number 9,17,35,53 and 85 are all halogens, they have electronic configuration of n s² n p⁵ .

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