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Chapter 3

Matter every thing that has mass takes up space
element the ingrediants that make up all other substances can't be broken down into other substances
metals good conductors of electricity and heat can bend without breaking most are gray and shiny
nonmetals does not conduct heat and electricity very well may be a gas or solid
semimetals sometimes like metals and sometimes like nonmetals
atom the smallest part of the element that still acts like a element
atomic theory states that everything is made of metal
compound a type of 2 or more elements
molecule smallest particle of a compound that still acts like a compound
proton positive charge found in the nucleus
electron negative charge orbits the nucleus
neutron no charge found in the nucleus
solid has a definite shape and volume,particles are very close together and can't move past each other keeps shape
liquid definite volume but not shape, particles can move past each other,takes shape of container
gas no definite volume or shape, particles spread out evenly and take shape of container can be squeezed into smaller volume
plasma like a gas, but conducts electricity like a metal,occurs with high temps or electric charge
melting point when solid to liquid or liquid to solid same temp as freezing point
evaporation when liquids become gas
condensation when gas become a liquid gas particles become a cold surface and then temperature drops