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Railways PYQCBT 1 2016

RRB NTPC · Question 21

The minimum reactive elements of the periodic table are: A. Transition Metals B. Alkaline Earth Metal C. Noble Gases D. Alkaline Metal

  1. D

  2. C

  3. B

  4. A

Show answer & explanation

Answer: (B) C

Explanation

Noble gases (helium, neon, argon and others) have completely filled outer shells, so they are the least reactive elements.