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JAMB Chemistry 1991 Question 13

Question 13

Periodic Table

Which of the following is arranged in order of increasing electronegativity?

  1. A.Chlorine, aluminium, magnesium, phosphorus, sodium.
  2. B.Sodium, magnesium, aluminium, phosphorus, chlorine
  3. C.Chlorine, phosphorous, aluminium, magnesium, sodium.
  4. D.Sodium, chlorine, phosphorus, magnesium, aluminium
Show the answer and explanation

Answer: B (Sodium, magnesium, aluminium, phosphorus, chlorine)

Explanation

Electronegativity increases across a period from left to right: Na < Mg < Al < P < Cl.