matter
- physical material of the universe
•
different compositions due to different arrangements of
elements
•
atoms
- smallest building blocks of matter
•
properties of matter change due to composition/structure of the atoms
•
molecule
- 2+ atoms joined in a specific shape
states of matter
- gas, liquid, or solid
•
gas
- aka vapor, has no definite shape/volume; molecules move at high speeds, often colliding w/ each
other
•
liquid
- definite volume, but no definite shape; molecules can slide over each other
•
solid
- definite shape/volume, molecules held tightly together
pure substances
- has distinct properties and doesn't vary from sample to sample
•
either elements or compounds
•
elements
- cannot be decomposed into simpler substances
o
oxygen, silicon, aluminum, iron, calcium make up most of crust
o
oxygen, carbon, hydrogen makes up most of human body
o
similar elements grouped in the same column on the periodic table
•
compounds
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- Spring '08
- vacillian
- Chemistry, Atom, Mole, pH, Chemical substance, chemically different substance, substance retains composition, definite shape/volume
-
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