Nature of Science & chemistry

Mass
the quantity of matter in an object
Weight
the force of attraction between an object and other objects
Property
anything observed or measured about a sample of matter
Extensive Property
depends on size of sample
.mass
.volume
Intensive Property
independent of sample size
.density: color, Mp, reactivity
Physical Properties
can be measured with out changing composition of sample
.Mass (e), Density(i), color melting point
Chemical property
flammability, reactions, explosiveness, failure not to react with another chemical
Physical Change
freezing, evaporation
Chemical Change
.Rusting
.Burning
Substance
a material that is chemically the same throughout
Element
substance cannot be broken down into simpler substance by chemical means
Compound
can be broken down into simpler substances
Mixture
a combination of two or more substances that can be separated in the physical properties
.filtering
Heterogenous Mixture
Composition change from one part to another
ex. mixture of salt and pepper
Acetate
CH3CO2-
Carbonate
CO3-2
Bicarbonate
HCO3-
Perchlorate
CLO4-
Chromate
CrO4-2
Cyanide
CN-
Dichromate
Cr2O7-2
Permanganate
MnO4-
Phosphate
PO4-3
Hydrogen Phosphate
HPO4-2
Dihydrogen phosphate
H2PO4-
1 mile
1.609km
1yd
.9144m
1ft
.3048m
1 inch
2.54cm
1 cubic ft
.02832m3
1gallon
3.785 dm3
quart
.9464dm3
1quart
946.4cm3
1floz
29.35cm3
1lb
0.4536kg
1oz
28.35g
x

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