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Unit 2 Properties and classification of Matter (Properties (Physical…
Unit 2 Properties and classification of Matter
Classifying Matter
Mixtures
Homogeneous mixture
looks like one substance
coffee, kool-aide, soda
heterogeneous mixture
can see different parts
choclolate chip cookie dough
Pure substances
Element
one type of atom
one capital letter
Compound
2 or more different atoms
2 or more capital letters
Properties
Physical Properties
color
Odor
density
hardness
structure
solubility
melting point, freezing point, boiling point
Chemical Properties
Reactivity
Flammability
pH
Physical change
melting, freezing, evaporating, ripping, mixing, breaking
Chemical Change
appearance of a gas
disappearance/appearance of a substance
Formation of a precipitate (solid)
Absorption of energy
Production of light, heat, or sound
changes in color, odor,
Explosion