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Chapter 3

The Properties of Matter

TermDefinition
atom the smallest part of an element that still has the properties of the element
atomic theory states that everything is made of atoms
matter everything that has mass and takes up space
element the ingredients that make up all the other substances. Can not be broken down into other substances
metals good conductors of heat and electricity. Can bend without breaking. Most metals have a gray color.
nonmetals do not conduct heat or electricity very well. May be a gas or a solid.
semi-metals [metalloid] sometimes like metals sometimes like nonmetals
compound a type of matter made of two or more elements
molecule smallest particle of a compound that still acts like that compound
proton positive charge. Found in the nucleus
neutron no charge. Found in the nucleus
electron negative charge. Orbits the nucleus.
solid a substance that has a definite shape and volume and its particles are very close together and don`t move past each other
liquid a substance that has a definite shape but not a definite and particles can move past each other and takes the shape of its container
gas a substance that has no definite shape or volume ,particles spread out evenly and take the shape of its container and can be squeezed into smaller volume
plasma like a gas, but conducts electricity like a metal and occurs with high temps or electric charge
melting point when solid to liquid or liquid to solid, but the same temp. as freezing point
evaporation when liquids become a gas
condensation when a gas becomes a liquid, gas particles touch a cold surface and the temperature drops
Created by: mary-griffith
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