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JAMB Chemistry 1978 Question 8

Question 8

Chemical Bonding

Elements P, Q, R, S, have 6, 11, 15, and 17 electrons respectively, therefore,

  1. A.P will form an electrovalent bond with R
  2. B.Q will form a covalent bond with S
  3. C.R will form an electrovalent bond with S
  4. D.Q will form an electrovalent bond with S
  5. E.Q will form a covalent bond with R.
Show the answer and explanation

Answer: D (Q will form an electrovalent bond with S)

Explanation

Q (2,8,1) is sodium, a metal that loses one electron, and S (2,8,7) is chlorine, which gains one. A metal and a non-metal like this form an electrovalent (ionic) bond.