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JAMB Chemistry 1997 Question 10

Question 10

Periodic Table

In the periodic table, what is the property that decreases along the period and increases down the group?

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

Answer: D (Atomic radius.)

Explanation

Across a period the rising nuclear charge pulls the electrons closer, so atoms get smaller; down a group new shells are added, so atoms get bigger.