Scientific Notation # from 1 to 9.999 x 10 exponent 800= 8 x 10 x 10 = 8 x 10 2 2531 = 2.531 x 10 x 10 x 10 = 2.531 x 10 3 0.0014 = 1.4 ÷ 10 ÷ 10 ÷ 10.

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Presentation transcript:

Scientific Notation # from 1 to x 10 exponent 800= 8 x 10 x 10 = 8 x = x 10 x 10 x 10 = x = 1.4 ÷ 10 ÷ 10 ÷ 10 = 1.4 x 10 -3

Change to standard form x 10 –5 = 3.7 x 10 8 = 7.88 x 10 1 = x 10 –2 = 370,000,

Change to scientific notation. 12,340 = = = 1,000. = x x 10 –1 8 x 10 – x 10 9

No Cussing! The following 4-Letter words are forbidden here: Inch Mile Foot Pint Yard Acre And we never swear the BIG F (use o C) Please keep it clean and Metric

SI System The International System of Units Derived Units Commonly Used in Chemistry Map of the world where red represents countries which do not use the metric system

The International System of Units Lengthmeter m Masskilogram kg Timesecond s Amount of substancemole mol TemperatureKelvin K Electric currentamperes amps Luminous intensitycandela cd QuantityNameSymbol Dorin, Demmin, Gabel, Chemistry The Study of Matter, 3 rd Edition, 1990, page 16

NEED TO KNOW Prefixes in the SI System Power of 10 for Prefix SymbolMeaning Scientific Notation _________________________________________________________ mega-M 1,000, kilo-k 1, deci-d centi-c milli-m micro-  nano-n

Significant figures Method used to express accuracy and precision. You can’t report numbers better than the method used to measure them cm = four significant figures Uncertain Digit Certain Digits ???

Significant figures The number of significant digits is independent of the decimal point These numbers All have three significant figures!