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Chapter 3

TermDefinition
Matter Everything that has mass and takes up space
Element The ingredients that make up all other substances. Can't be broken into other substances.
Metals Good conductors of electricity and heat. Can bend without breaking. Most have a gray color and are shiny.
Non-metals Do not conduct heat / electricity very well. May be a gas or solid.
Semi-metals Sometimes like metals and sometimes like non-metals.
Atoms The smallest part of an element that still acts like a element
Atomic Theory States every thing is made of atoms
Compound A type of matter made up of two or more elements
Molecule smallest particle of a compound that is still acts like a compound
Protons Positive charge. found in the nucleus
Neutrons No charge. Found in the nucleus
Electrons Negative charge. Orbits around the nucleus
solid Has a definite shape and volume. Particles are very close together, and don’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
Plasmas 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 a liquid turns in to a gas
Condensation When gas become a liquid. Gas particles touch a cold surface and the temperature drops
Created by: sarah-mayo
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