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Periodic Table basic
Term | Definition |
---|---|
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 |