Unformatted text preview: atoms become smaller, with greater nuclear charge. Decrease as we go down a group. Trends in Ionic Size
Cations form by losing electrons. Cations are smaller than the atom they come from. Metals form cations. Cations of representative elements have noble gas configuration. Ionic size
Anions form by gaining electrons. Anions are bigger that the atom they come from. Nonmetals form anions. Anions of representative elements have noble gas configuration. Configuration of Ions Ions always have noble gas configuration. Na is: 1s22s22p63s1 Forms a 1+ ion: 1s22s22p6 Same configuration as neon. Metals form ions with the configuration of the noble gas before them they lose electrons. Configuration of Ions
Nonmetals form ions by gaining electrons to achieve noble gas configuration. They end up with the configuration of the noble gas after them. Group trends Adding energy level Ions get bigger as you go down. Li1+ Na1+ K1+ Rb1+ Cs1+ Periodic Trends
Across the period, nuclear charge increases so they...
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