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9 - Mod 4 Lesson 3

TermDefinition
alkali metals elements in group 1 of the periodic table; they are the most reactive; their atoms have one electron in their outer level
alkaline earth metals the elements in Group 2 of the periodic table; they are reactive metals but are less reactive than alkali metals; their atoms have two electrons in their out level
transition metals elements that form a bridge between elements on the left and right sides of the periodic table
halogens the elements in group 17 of the periodic table; they are very reactive nonmetals, and their atoms have seven electrons in their outer level
noble gases the unreactive elements in group 18 of the periodic table; their atoms have eight electrons in their outer level (except helium, which has two electrons)
Created by: Ms. Greenup
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