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JAMB Chemistry 1988 Question 2

Question 2

Chemical Formulae and Equations

The formula of the compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is

  1. A.MX
  2. B.M3X4
  3. C.M4X3
  4. D.M3X2.
Show the answer and explanation

Answer: C (M4X3)

Explanation

Cross the valencies: M has valency 3 and X has valency 4, so 4 atoms of M combine with 3 atoms of X, giving M4X3.