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The most electronegative element among the following is

  • A.Sodium
  • B.Bromine
  • C.Fluorine
  • D.Oxygen

Answer: C

Fluorine is the most electronegative element, at 4.0 on the Pauling scale.

Electronegativity rises across a period as nuclear charge increases, and falls down a group as the atom grows. Fluorine sits at the top right of the reactive elements, so it holds bonding electrons more strongly than anything else; oxygen follows at 3.5.

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