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JAMB Chemistry 1988 Question 10

Question 10

Periodic Table

Which of the following physical properties decreases across the Periodic Table?

  1. A.Ionization potential
  2. B.Electron affinity
  3. C.Electronegativity
  4. D.Atomic radius
Show the answer and explanation

Answer: D (Atomic radius)

Explanation

Across a period the nuclear charge increases while electrons go into the same shell, so they are pulled closer and the atomic radius decreases. The other three properties increase.