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Periodic Table

8th Grade Periodic Table

TermDefinition
Period The horizontal rows on the periodic table. Elements in the same row have the same number of electron shells/energy levels.
Family/Group The vertical columns on the periodic table. Elements in the same group/family have the same number of valence electrons. (Except Helium which is in Group 8, but only has 2 valence electrons.
Metals Are good conductors of electric current and heat. -Malleable -Ductile -Metallic luster -Solid at room temperature
Malleable Capable of being shaped. Easy to shape or bend.
Ductile Describes a material that can be pulled out into a long wire.
Alkali Metals The elements in Group 1A of the periodic table (except Hydrogen). VIOLENTLY REACT with water, and produce alkaline (basic) substance.
Alkali Earth Metals The elements in Group 2A of the periodic table. Shiny, Silvery-white Very reactive
Transition Metals Group B elements Form a bridge between the elements of the left and right sides of the Periodic Table (middle of the table). -Non-reactive metals. -Less predictable than other elements.
Metalloids Elements that have properties of both metals and nonmetals.
Non-metals -Brittle when solid -Dull -Poor conductors -Lower melting and boiling points than metals
Halogens The elements in Group 7A of the periodic table. -Very reactive -Poisonous -Bleaches and disinfectants
Noble Gases The elements in group 8A of the periodic table. -Colorless -Odorless -Extremely NONREACTIVE
Created by: russ.caudill