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Chapter 5 PS

TermDefinition
Periodic Law the principal that properties of elements n table repeat at regular intervals
period horizontal row on table
group vertical column on table
periodic trends repeating patterns of chemical properties shown in periodic table
valence electrons electrons in outer most shell of an atom
ionization process of an atom becoming an ion
ion a charged atom
cation positive atom/ion
anion negative atom/ion
metals good conductors of electricity and thermal energy
nonmetals poor conductors of electricity and thermal energy
semiconductors can conduct electricity under certain conditions
alkali metals group 1, 1 valence electron, very reactive
alkaline-earth metals group 2, 2 valence electrons, reactive
transition metals groups 3-12, quiet unreactive
synthetic all have an atomic number greater than 92, radioactive
noble gases group 18, 8 valence electrons, inert (unreactive)
halogens group 17, 7 valence electrons
Created by: kendraostermeier
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