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Periodic Table Vocab

Group vertical columns on Periodic Table
Period horizontal rows on Periodic Table
Principal Energy Level "shell" of electrons
Valence shell outermost layer of electrons; identified by period number
Valence electrons electrons in outermost shell; bonding electrons
Octet rule Valence shell can hold a maximum of eight electrons
Periodic Law elements have a repeating (periodic) pattern of characteristics
Mendeleev Organized first periodic table
Modern periodic table organized by atomic number
Alkali Metals group 1/1A metals
Alkaline Earth Metals group 2/2A metals
Transition metals "B group"; characterized by brightly colored ions and multiple oxidation states
Halogens group 17/7A; only group to have all three states of matter
Noble Gases group 18/0; nonreactive gases; full valence shell
Created by: mrsflower