2237090
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CHEMISRTY 1
- ATOMIC STRUCTURE
- electron
charge: -1
- proton
charge: +1
- neutron
charge: 0
- electron
charge: -1
- -LIMESTONE is a sedimentary rock made from the
compound calcium carbonate. -Formula is CaCo3.
-Formed from the remains of tiny sea creatures, from
millions of years ago. -When limestone is heated a
thermal decompostion reaction occurs
- LIMESTONE QUARRING has three different issues
Environmental, Economic and Social
- EXTRACTING METALS
- -Ores are most metals that
have to be extracted from
metal-containing rocks.
-Metals in the reactivity
serise can be extracted by
heating their oxides with
carbon. -this technque is
called Reduction By Carbon
or Smelting. -it is a
displacement reaction
- metal oxides + carbon ->
metal + carbon dioxide
- -Ores are most metals that
have to be extracted from
metal-containing rocks.
-Metals in the reactivity
serise can be extracted by
heating their oxides with
carbon. -this technque is
called Reduction By Carbon
or Smelting. -it is a
displacement reaction
- COMPOUND STEELS
- - The simplest steels. -Used
for car bodies, knifes,
machinery, ships and
buildings. -Made be removing
most of the carbon but
leaving small amounts of it.
-Contains less than 0.1%
carbon. -Soft and bendy.
- - The simplest steels. -Used
for car bodies, knifes,
machinery, ships and
buildings. -Made be removing
most of the carbon but
leaving small amounts of it.
-Contains less than 0.1%
carbon. -Soft and bendy.
- LOW ALLOY STEELS
- -More
expensive than
carbon steels.
-Contains
between 1%
and 5% of other
metals. -Used
for bike chains
and suspension
cables. -Strong.
- -More
expensive than
carbon steels.
-Contains
between 1%
and 5% of other
metals. -Used
for bike chains
and suspension
cables. -Strong.
- -ALUMINIUM is the most
abundant metal in the
earths crust. -It is found
in the ore bauxite.
-Electrolysis needed to
separate Al and O. -Very
expensive. -Causes
environmental issues.
- -TITANIUM is the
4th most
abundant metal
in the earths
crust. -It is found
in the ore rutile.
-Very strong and
low density. -Very
high melting
point. -Resists
corrosion. Its vary
expensive
- Sulphur dioxide causes acid rain.
- COPPER is very unreactive.
- ELECTROLYSIS is when ions are attracted to the negative
electrode and deposited on the electrode as a copper metal.
- TRANSITION METALS
-In the centre of
the periodic table.
-All metals.
-Unreactive. -Have
a high density.
-Conduct
electricity and
heat
- RECYCLING METALS saves a
lot of energy. -Help saves
our fuel supply. -Reduces
the need to mine for
metal ore. -Copper is
hard to extract due to it
often being alloyed with
other metals.
- METALLIC STRUCTURE
- BENEFITS. -Copper is a
good electrical conductor
for wiring. -Lead can be
bent easily so is used to
seal joints on roofs. -Steel
is strong for scaffolding.
-Aluminium alloys are
corrosion resistant
- DRAWBACKS. -Iron steel can rust,
weakening structures. -Metal extraction
causes pollution and uses most of the
earths limited resources. -Metals are
more expensive than other materials, e.g
concrete.
- BENEFITS. -Copper is a
good electrical conductor
for wiring. -Lead can be
bent easily so is used to
seal joints on roofs. -Steel
is strong for scaffolding.
-Aluminium alloys are
corrosion resistant
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