Section 11.1- Metallurgy Flashcards
form between metal atoms
metallic bonds
elements that have some characteristics of both metals and nonmetals
semimetals
most metals occur in earth in the form of
minerals
the complex process of extracting metals from their naturally occurring materials and preparing them for use
metallurgy
a naturally occurring material containing a metal in sufficient concentration to make its extraction profitable
ore
one widely used separation method which involves mixing an oil, water, and a carefully selected detergent with the crushed material in a huge tank; the mixture is agitated until froth develops
flotation
the ore-bearing rock is often ground and crushed, and the ore is separated from the unwanted earthy material known as
gangue
physical properties of metals
- high electrical and thermal conductivity
- electrical conductivity decreases with increasing temperature
- malleable and ductile
- metallic luster
physical properties of semimetals
- intermediate electrical and thermal conductivity
- electrical conductivity increases with increasing temperature
- brittle
- slight luster
attracted to the oil, the ore is _____________ in the oil-detergent froth and skimmed off
concentrated
the second major step is to _____________ the metal in the compound to the free metal
reduce (
reduction involves a
gain of electrons
a substance that will react with the gangue which is added in the reduce step
flux
the third step is to ____________ the extracted metal to the desired degree of purity
refine
techniques for refining the extracted metals
electrolyte refining
basic oxygen process
