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Atoms and Molecules

TermDefinition
atom basic building block of matter
matter anything that has mass and takes up space
mass the amount of matter that makes up a substance
volume the space taken up by a substance
proton subatomic particle found in the nucleus of an atom which has a positive charge
neutron subatomic particle found in the nucleus of an atom which has a neutral charge
electron subatomic particle found outside the nucleus of an atom which has a negative charge
job of proton determines the identity of an atom
job of neutron holds the nucleus together
job of electron involved in chemical reactions
atomic number the number of protons or electrons
atomic mass the number of protons + neutrons
periodic table chart of known elements organized by atomic number
molecule atoms bonded together to form a new substance
Created by: mlnicolas
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