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JAMB Chemistry 2006 Question 36

Question 36

Periodic Table

A decrease in atomic size and an increase in nuclear charge across a period lead to

  1. A.an increase in the tendency to lose electrons
  2. B.an increase in chemical reactivity
  3. C.a decrease in electropositivity
  4. D.a decrease in covalency in bond formation.
Show the answer and explanation

Answer: C (a decrease in electropositivity)

Explanation

Across a period the outer electrons are pulled more strongly by the nucleus, so atoms lose electrons less easily: elements become less electropositive (less metallic).