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JAMB Chemistry 1986 Question 9

Question 9

Periodic Table

Which of the following groups of physical properties increases from left to right of the Periodic Table? 1 Ionization energy 2 Atomic radius 3 Electronegativity 4 Electron affinity

  1. A.1 and 2
  2. B.1, 2 and 3
  3. C.3 and 4
  4. D.1,2,3 and 4.
Show the answer and explanation

Answer: C (3 and 4)

Explanation

Across a period the nuclear charge rises, so electronegativity and electron affinity increase while atomic radius decreases. Every option except C includes atomic radius, which does not increase.