Atomic radius is conveniently measured in which unit?

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._