Metric prefixes 10 mega M 1000000 10 6 kilo k 1000 10 3 hecto h 100 10 2 deka

Metric prefixes 10 mega m 1000000 10 6 kilo k 1000 10

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Metric prefixes 10 mega M 1,000,000 10 6 kilo k 1,000 10 3 hecto h 100 10 2 deka da 10 10 1 - 1 10 0 deci d 0.1 10 -1 centi c 0.01 10 -2 milli m 0.001 10 -3 micor m 0.0000001 10 -6 nano n 0.000000001 10 -9
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Atoms, Molecules, and Compounds Substance- kind of matter with uniform properties Atom fundamental unit of a substance Molecule- two or more atoms held in specific shape by attractive forces Elementary substance - Substance with only atoms of the same atomic number Compound substance - substance with more than one type of atom Chemical formula elements listed with number of atoms as subscript 11
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Classification of Matter Matter: Anything taking up space and having mass 3 Phases Solid definite volume and shape Liquid definite volume but variable shape Gas variable volume and shape 12
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Properties Specific characteristics that can distinguish substances Physical properties- observed without change in composition of substance Chemical properties- only evident if substance goes through chemical change i.e. enthalpy of combustion Chemical change requires new substance before and after 13
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Mixtures Heterogeneous Mixture: distinguishable parts Homogenous Mixture: indistinguishable parts (Solution) ydir.demon.co.uk / jo/minerals/marble.htm . org/wiki/Quicksand wiki/Hydrochloric_acid 14
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Pure Substance Cannot be separated by any physical means Separation of saltwater: Distillation Boil water and salt stays behind Water pure substance 15
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Pure Substance Oxygen Hydrogen Hydrogen Can only be separated by chemical means 16
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  • Spring '08
  • Kenney
  • Chemistry, Review, Accuracy and precision, Chemical substance, Compound substance- substance

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