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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; exist 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
transition metal elements found in Groups 3-12
trend a repeating pattern on the periodic table
Created by: vfenstermaker