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Chapter three

matter anything that has mass and takes up space
elements the ingredients that make up all the other substances
metals conductors of electricity and heat
nonmetals metals that don't conduct heat very well
semimetals sometimes like nonmetals and sometimes like metals
atom the smallest part of an element and still have the properties of an element
atomic theory the idea that everything is made of atoms
compound a type of matter made of two or more elements
molecule the smallest part of a compound but still acts like a compound
proton determines what an element will be (positive charge)
neutron no charge
electron negative charge
solid substance that has a definite shape and volume
liquid substance that has a definite volume but no definite shape
gas substance with no definite shape or volume
melting point point where a solid turns to a liquid
evaporation when a solid or a liquid become a gas
Created by: emily-stucky