Solve this multiple-choice question and choose the correct option.

Reactivity (halogens): The very high chemical reactivity of fluorine is mainly due to what factor? Consider periodic trends and bond energetics. Choose the best reason.

Difficulty: Easy

Its high electronegativity
Small size of fluorine atom
Availability of d-orbitals
Strong F–F bond

Correct Answer: Its high electronegativity

Explanation:

Concept/ApproachFluorine has the highest electronegativity and very high electron affinity, driving strong oxidizing power. Its small size also contributes, but the principal textbook reason cited is electronegativity. Options (c) and (d) are incorrect: fluorine lacks accessible d-orbitals and the F–F bond is relatively weak, not strong.

Final AnswerIts high electronegativity

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