Which prefix is used for 10^-6?

The prefix used for 10^-6 is "Micro." This prefix is derived from the Greek word "mikros," meaning small. In the International System of Units (SI), the micro prefix signifies one millionth of a unit. For example, when referring to a micrometer, it represents one millionth of a meter.

In contrast, the other prefixes denote different orders of magnitude: "Nano" corresponds to 10^-9 (one billionth), "Pico" represents 10^-12 (one trillionth), and "Femto" signifies 10^-15 (one quadrillionth). Understanding these prefixes is vital in various scientific fields, especially in measuring small quantities such as in physics, chemistry, and engineering.