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Unilorin Post-UTME Chemistry 2023 (Model questions) Question 1

Question 1

Periodic Table

Which of the following elements has the highest electronegativity?

  1. A.sodium
  2. B.chlorine
  3. C.fluorine
  4. D.oxygen
Show the answer and explanation

Answer: C (fluorine)

Explanation

Fluorine is the most electronegative element (3.98 on the Pauling scale), higher than oxygen (3.44) and chlorine (3.16).