most reactive metals
alkali metals
least reactive metals
transition/post transition metlas
least reactive family of all
noble gases
toxic to living cells
halogens
most reactive nonmetal family
halogens
never found uncombined in nature
alkali, alkaline earth and rare earth metal families
ductile and malleable
transition/post transition metals
inert
noble gases
least dense metals
alkali metals
Form -1 ions
halogens
most dense metals
rare earth metals
most reactive of the families on the nonmetal side of the PT
halogens
Don't form ions
noble gases
1 valence shell electron
alkali metals
8 valence shell electrons
noble gases (except helium)
Form +2 ions
alkaline earth metals
Form organic compounds
nonmetals
All family members are gases at room temperature
noble gases
softest metals
alkali metals
Form +1 ions
alkali metals
7 valence shell electrons
halogens
2 valence shell electrons
alkaline earth metals
Has members in all three states of matter at room temperature
halogens
Lowest melting and boiling points of the periodic table
noble gases
"Elements of life"
nonmetals
Most difficult to extract from ore
Rare earth metals
semi-conductors
metalloids
Explosive in water
alkali metals
Characteristics of both metals and nonmetals
metalloids
Trend for electronegativity
electronegativity decreases from top to bottom and increases from left to right
Trend for ionization energy
first ionization energy decreases from top to bottom and increases from left to right
Trend for atomic radius
radius increases down the periodic table and decreases from left to right
Multiple oxidation states
rare earth metals; transition metals
Form ions based on column
metalloids, nonmetals