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JAMB Chemistry 1978 Question 50

Question 50

Atomic Structure

The size (diameters) of five atoms are in the order: R < T < W < X < Y, Y being largest. If each atom has an electron situated on its circumference, and neglecting other factors, which of the atoms will lose its electron most reluctantly?

  1. A.R
  2. B.T
  3. C.W
  4. D.X
  5. E.Y.
Show the answer and explanation

Answer: A (R)

Explanation

The smaller the atom, the closer the outer electron is to the nucleus and the more strongly it is held. R is the smallest, so it loses its electron least easily.