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NDA 2018 GAT · General Knowledge · Atomic Structure, Periodic Table and Bonding · medium

An element with atomic number 12 belongs to which group of the periodic table?

Single correct option

An element with atomic number 12 belongs to which group of the periodic table?
  1. A. Group 1
  2. B. Group 12
  3. C. Group 2
  4. D. Group 18
Show answer and solution

Answer: (C) Group 2

Atomic number 12 is magnesium, with the configuration 2, 8, 2. It has two valence electrons, so it falls in Group 2, the alkaline earth metals. Group 1 would have one valence electron, and the digit 12 tempts students toward Group 12. Group 18 contains noble gases with full shells.
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Original question written in the NDA 2018 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake