Which prefix denotes 10^-6?

Which prefix denotes 10^-6?

• A. 10^-9
• B. 10^-3
• C. 10^-6
• D. 10^6

Answer: (C)

In the SI system, prefixes scale units by powers of ten. The one that denotes 10^-6 is micro-, usually written with the symbol µ. That means 1 µm is 1 × 10^-6 meters, 1 µg is 1 × 10^-6 grams, and so on. The other prefixes shown map to different powers of ten: nano- is 10^-9, milli- is 10^-3, and mega- is 10^6. So the prefix for 10^-6 is micro- (µ).

In the SI system, prefixes scale units by powers of ten. The one that denotes 10^-6 is micro-, usually written with the symbol µ. That means 1 µm is 1 × 10^-6 meters, 1 µg is 1 × 10^-6 grams, and so on. The other prefixes shown map to different powers of ten: nano- is 10^-9, milli- is 10^-3, and mega- is 10^6. So the prefix for 10^-6 is micro- (µ).