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Periodic Table

Unit 1-Periodic Table

TermDefinition
alkali metal elements in Group 1; have 1 valence electron; highly reactive
alkaline earth metal elements in Group 2; have 2 valence electrons; reactive (but not as much as group 1)
energy level "rings" or shells that show electron placement; useful as a model to help visualize the electron cloud
group vertical columns on the periodic table
halogen elements in Group 17; very reactive with metals; known as "salt formers"
metal elements found left of the zigzag line; usually good conductors of heat and electricity; shiny, malleable, ductile
metalloid elements found along the zigzag line (except aluminum); share properties of metals and nonmetals
noble gas elements in Group 18; stable elements that do not bond due to their full outer energy level
nonmetal elements found right of the zigzag line; usually poor conductors of heat and electricity; dull, brittle
period horizontal rows on the periodic table
periodic table orderly arrangement of elements by increasing atomic number and changes in physical and chemical properties
trend a repeating pattern on the periodic table
Created by: vfenstermaker
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