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chapter 3

matter/ elements/ periodic table

TermDefinition
matter This is anything that takes up space
element basic kinds of matter
metal Good conductors of electricity and heat. Can be handled without breaking. Most have a gray color.
nonmetal Do not conduct heat/ electricity very well. May be a gas or solid.
semimetal sometimes like metals and sometimes like nonmetals.
atom the smallest part of an element that still acts like that element.
atomic theory states everything is made of atoms.
proton Positive charge, found in the nucleus.
neutron No charge, found in the nucleus.
electron Negative charge, orbits the nucleus.
compound A type of matter made of two or more elements.
molecule Smallest part of a compound that still acts like the compound.
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 no definite 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 a gas.
condensation When gas become a liquid. Gas particles touch a cold surface and the temperature drops
Created by: madison-whitlock
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