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Vocabulary #12

8th Grade Science Vocabulary

TermDefinition
Valence electron The outermost electron of an atom that participates in chemical bonding.
Alkali metals The metals in GROUP 1 of the periodic table; they are the most reactive metals; their atoms HAVE ONE VALENCE ELECTRON
Alkaline-earth metals The elements of GROUP 2 of the periodic table; they are very reactive metals but are less reactive than alkali metals; their atoms HAVE TWO VALENCE ELECTRONS
Halogens The elements in GROUP 17 of periodic table; they are very reactive nonmetals; their atoms HAVE SEVEN ELECTRONS
Noble gases The elements in GROUP 18 of the periodic table; they are unreactive nonmetals; their atoms HAVE EIGHT VALENCE ELECTRONS(except for helium, which has two electrons)
Created by: ehudson1
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