MCQ practice · SSC Chemistry Board questions · Chapter 5: Chemical Bond
Which forms a diatomic molecule?
Think it through first, then pick an option.
- a Fluorine
- b Ozone
- c Helium
- d Beryllium
Answer and explanation
Correct answer: a Fluorine
Fluorine's molecule is F₂: two atoms.
Why the other options are wrong
- b Ozone: Ozone is O₃, triatomic, not diatomic. The answer the book supports is Fluorine.
- c Helium: Inert gases form no molecules; He is monatomic.
- d Beryllium: Be is a metal; metals are written as single atoms by symbol.
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