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Periodic Table basic

TermDefinition
Periods horizontal rows on the periodic table
atomic number number of protons in an element
symbol represents an element
families/groups vertical columns on the periodic table
valence the electrons in the outermost energy level
neutron neutral subatomic particle
electron negative subatomic particle
mass number number of protons and neutrons
proton positive subatomic particle
Created by: cynthia_ritter
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