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Periodic Table Ch 3

The Periodic Table

TermDefinition
alkali metal An element in group 1A of the periodic table
nonmetal An element that has no metallic properties Ex. radium, oxygen, carbon
transition element elements in groups 3 thru 12 on the periodic table
halogen an element in group 17 on the periodic table Ex. bromine, chlorine, iodine
metalloid an element that has physical and chemical properties of metals and nonmetals
malleability the ability of a substance to be hammered or rolled into sheets Ex. gold leaf or aluminum foil
semiconductor A substance that conducts electricity at high temperatures but not at low temperatures
noble gas an element in group 18 on the periodic table
alkali earth metal An element in group 2 of the periodic table
periodic table A chart of elements arranged into rows and columns according to their physical and chemical properties
group a column on the periodic table (goes up and down)
period a row on the periodic table (goes across)
metal an element that is generally shiny and is easily pulled into wires or hammered into this sheets and is a good conductor of electricity and thermal energy Ex. copper, iron, tin
luster the way a mineral reflects or absorbs light at its surface reflect=shiny absorb= dull
ductility the ability to be pulled into thin wires