Question

The radius of an oxygen atom is 0.073 nm. What does the symbol 'nm' represent ?

Answer 1

nm is the unit stands for nano meter.n stands for nano which is a prefix and its value is 10⁻⁹.m stands for meter which is a base unit for length.

Answer 2

The symbol ‘nm’ represents nanometre.

Explanation:

• In the metric system, Nanometre is the unit of length. It is equal to one billionth in a part, which is $0.000000001 m$. One meter is equal is  $10_{9} m$ or $\frac{1}{109}$ nanometres.
• It can also be written as $\frac{1}{1000000000}$  metres. In engineering terms, it is written as 1 E−9 m. In scientific terms, it is written as $1 \times 10^{-9} \mathrm{m}$.
• Example: The radius of an oxygen atom is 0.073 nm, in which ‘nm’ represents the atomic radius’ unit.