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JAMB Chemistry 2001 Question 9

Question 9

Atomic Structure

Four elements W, X, Y, and Z have atomic number 2, 6, 16 and 20 respectively. Which of these elements is a metal?

  1. A.X
  2. B.W
  3. C.Z
  4. D.Y
Show the answer and explanation

Answer: C (Z)

Explanation

Atomic number 20 is calcium (2, 8, 8, 2), a metal. The others are helium (2), carbon (6) and sulphur (16), all non-metals.