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JAMB Chemistry 1988 Question 11

Question 11

Redox Reactions

What are the possible oxidation numbers for an element if its atomic number is 17?

  1. A.−1 and 7
  2. B.−1 and 6
  3. C.−3 and 5
  4. D.−2 and 6
Show the answer and explanation

Answer: A (−1 and 7)

Explanation

Element 17 is chlorine (2, 8, 7). It can gain 1 electron (−1) or use all 7 outer electrons (+7).