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metals
elements that are shiny, malleable, good condutors of heat and electricity
nonmetals
elements that appear dull, poor conductors of heat and electricity
metalloids
elements that conduct heat and electricity moderately well, has properties of metals and nonmetals
main group elements
groups 1, 2, 13-18
transition metals
groups 3-12
inner transition metals
2 rows at bottom
lanthanides
top row elements
actinides
bottom row elements
alkali metals
group 1
alkaline earth metals
group 2
pnictogens
group 15
chalcogens
group 16
halogens
group 17
noble gases
group 18