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Chpter 3

TermDefinition
matter anything that takes up space.
Elements All the other substances, can't be broken down
metals good conductors of heat, can bend without breaking, most have a gray color.
nonmetals don't conduct heat or electricity.
semimetals are both metal and nonmetals.
compound is a type of matter made of two or more elements
molecule smallest partial of a compound that still acts like that compound
atoms smallest part of an element that still acts like that element
Atomic theory states that everything is made of atoms
protons positive charge. found in the nucleus
neutrons no charge. found in the nucleus
electrons negative charge. orbits the nuceus
solid has a definite shape and volume
liquid definite volume no definite shape
gas has no defiant shape or volume
plasma like a gas, but conducts heat and electricity, occurs at high temps.
melting point when a solid turns in to a liquid or liquid to solid. freezing point is the same as the melting point
evaporation when liquid becomes a gas
condensation when a gas becomes a liquid. gas partials touch a cold surface and the temp. drops.
Created by: sarah-beck
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