The nano unit is represented by the prefix "nano" and has a scientific notation of 10⁻⁹.

Here's a breakdown:

* Nano (n): Represents one billionth (1/1,000,000,000) of a unit.

* Scientific Notation: A way to express very large or very small numbers using powers of ten.

Therefore, 1 nanometer (nm) is equal to 1 x 10⁻⁹ meters (m).