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JAMB Chemistry 1986 Question 8

Question 8

Chemical Bonding

An element with atomic number twelve is likely to be

  1. A.electrovalent with a valency of 1
  2. B.electrovalent with a valency of 2
  3. C.covalent with a valency of 2
  4. D.covalent with valency of 4.
Show the answer and explanation

Answer: B (electrovalent with a valency of 2)

Explanation

Atomic number 12 is magnesium, 2,8,2. It loses its two outer electrons to form Mg2+ ions, so it forms electrovalent bonds with a valency of 2.