metals and its application Flashcards
the atoms in a pure metal are in highly-packed layers, which form a regular ______ structure
lattice
the outer electrons of the metal atoms separate from the atoms and create a
sea of electrons
these electrons are ______ and so are free to move through the whole structure
delocalized
the metal atoms become positively charges ions and attracted to the sea of electrons. This called
metallic bonding
metals have high melting points and boiling points. Gold has a melting of _____ and a boiling point of _______
1064 and 2807
its the gradual destruction of a metal due to reactions with other chemicals in its environment
corrosion
35, 500, 000 tons of _____ produced in 2005
aluminum
its worth more than 10, 000 per kilogram
gold
its increased the production of it by more than 20 times in the 20th century
copper
it is used as catalyst to make margariine
nickel
used as catalyst converters in car exhaust
platinum
It is a vert reactive metal. But it not corrode in the presence of oxygen
aluminum
Its the specific name given to the corrosion of iron
rusting
what is the chemical name for rust
hydrated iron oxide
some unreactive metals, like gold, silver, and copper, can be found as
elements
metals that are found in a pure form are to occur
native
metals above carbon in the reactivity series must be extracted using by what
electrolysis
metals below carbon can be extracted by their ores using what
reduction
It is a mixture of a metal with at least one other element
alloy
alloy of copper and zinc, and does not tarnish and its used for door knob and musical instrument
brass
alloy of zinc and lead, and used in electronics
solder
alloy of mercury and silver or tin, and used for dental fillings
amalgam
contains less than .25%
low carbon steel
contains more than .5%
high carbon steel
alloy of iron that contains at least 11%if chromium and smaller amounts of nickel and carbon
stainless steel
it is a type of smart material made from metals that returns to its original shape after being deformed
shape memory alloy
it is a type of shape memory alloy made from nickel and titanium
nitinol
