Question

The size of atoms is nearly ____________

(a) 0.01 nm

(b) 0.1 nm

(c) 1 nm

(d) 10 nm

The question was posed to me during an online interview.

The origin of the question is Nanoscience and Nanotechnology in section Nanomaterials of Engineering Physics II

Answer 1

Correct choice is (b) 0.1 nm

The best I can explain: The size of the atoms is nearly 0.1 nm. The smallest naturally occurring atom, helium, is 0.1 nm in size. Thus, nanotechnology can be used to study their characteristics and properties or even control them.