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Atomic radius is conveniently measured in which unit?
AMicrometres
BMillimetres
CNanometres
DCentimetres
Answer & Solution
Correct answer: C. Nanometres
1. Atoms are extremely small, of the order of 10⁻¹⁰ m.
2. Among the given options, the nanometre (10⁻⁹ m) is the closest practical scale.
3. Hence atomic radius is measured in nanometres.
_Source: RRB Group D CEN-02/2018 PYQ, Q.82._
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