Units of Measurement s1

Units of Measurement Handout

SI Base Units ______Physical Quantity Name of Unit SI Symbol ______Length Meter m Mass Kilogram kg Time Second (s) Second (s) Temperature Celsius (C) Kelvin (K) Amount of substance Mole mol ______

Metric Prefixes

______Prefix Symbol Meaning Number Scientific Notation ______Prefixes that increase the size of the unit mega- M one million 1 000 000 106 kilo- k one thousand 1 000 103

Prefixes that decrease the size of the unit deci- d one tenth 0.1 10-1 centi- c one hundredth 0.01 10-2 milli m one thousandth 0.001 10-3 micro-  one millionth 0.000 001 10-6 nano- n one billionth 0.000 000 001 10-9 ______

Converting Within the Metric System: Examples of Conversion Factors ______Prefix Base Unit Symbol Unit Equivalence Conversion Factors ______

1Mm 106 Mm Mega- meter Mm 1 Mm = 106 m or 106 m 1m 1km 103 km Kilo- meter km 1 km = 103 m or 103 m 1m 1 meter 1dm 10dm Deci- meter dm 1 dm = 0.1 or 10-1 m or 101 m 1m 1cm 102 cm Centi- meter cm 1cm = 0.01 or 10-2 m or 102 m 1m 1mm 103 mm Milli- meter mm 1mm = 0.001 or 10-3 m or 103 m 1m

General Chemistry