-
what are the specific properties of copper
copper is a good conductor of electricity , so it's ideal for elctrical wires . it's hard and strong but can be bent . it doesnt react with water
-
what are the specific properties of aluminium
- silvery , shiny
- low density
- good conductor of heat and electricity
- very easily shaped
- pure aluminium isnt particuarly strong but it forms had , strong alloys
-
what are the specific properties of titanium
- low density
- strong
- corrosion resistant
- very high melting point
- has an oxide layer
-
what properties make titanium ideal to use in jet engines and nuclear reactors
- very high melting point
- light
- strong
-
different metals are chosen for different uses because of thier specific properties for example : if you were doing so plumbing , you pick a metal that could be .... to make pipes and tanks , and is below ..... in the reactivity series so it doesn't ...... with .... . .... is great for this
- bent
- hydrogen
- react
- water
- copper
-
different metals are chosen for different uses because of thier specific properties for example : if you wanted to make an areoplane , you probably use a metal as it's ... and can be easily .... into ... . but you'd also need it to be .... , so ..... would be a good choice
- strong
- bent
- shape
- light
- aluminium
-
different metals are chosen for different uses because of thier specific properties for example : if you were making hip replacements , you'd pick a metal that .... ... when it comes in contact with ... . it'd also have to be .... too and not too .... . .... has all of these properties so it's used for this
- won't corrode
- water
- light
- bendy
- titanium
-
when deciding which metal to make something out of we have to look at its properties , we can alter the properties of a metal by combining other atoms with it we call this an alloy . if we want a metal that is strong , light and does not corrode often titanium and aluminiun is used . Both of these materials do not corrode but why ?
both of these materials will not corrode , because although the metals themselves are reactive , they readily react with oxygen atoms in the air and so an oxide layer is formed on the surface of the metal , this forms titanium oxide and aluminum oxide respectively .this means that acid neither water nor oxygen can get to the metal atoms , so it canot react with them , making the metals corrosion resistant
-
transition metals are typical metals . thier properties therefor include :
- high melting points and high densities
- good conductors of both heat and electricity
- strong and shiny
- malleable and ductile
-
transition metals are typical metals . thier properties therefor include :
high melting points and high densities
good conductors of both heat and electricity
strong and shiny
malleable and ductile
these properties mean that they are useful as :
- structural materials
- and they are useful for maing things that must allow heat or electricity to pass through them easily
-
what properties of titanium make it particuarly useful for making artificial joints
- light
- unreactive , so wont react with chemicals in your body
-
why is aluminium used for overhead cables
because it is light and conducts electricity
-
aluminium has a high reactivity but is corrosion resitant
why ?????
because it has a protective layer of aluminium oxide on top of it . this layer forms because aluminium is so reactive that it reacts with the oxygen in the air . this means that acid neither water nor oxygen can get to the aluminium atoms , so it cannot react with them
-
give two properties of titanium that makes it more useful than steel for hip replacement joints
- it is 45% lighter than steel
- less dense
-
in th reactos magnesium is used to produce titanium . if carbon were used instead of magnesium no titanium would be produced . what does this tell us about the relative reactivities of carbon , magnesium and titanium
- magnesium is more reactive than titanium
- magnesium and titanium are more reactive than carbon
-
most titanium is produce from its ore , titanium oxide , by a batch process that takes 17 days
titanium reactors produce about 1 tonne of the metal per day . iron blast furnaaces produce 20000 tonnes of the metal per hour
the use of titanium is limited because it is expensive , explain why titanium costs more than iron
- titanium extraction takes a long time whereas iron extraction doesnt take as long
- there is a low abundance of titanium ore wheareas iron is the second most common metal in th earths crust
- titanium extraction is more labour intensive than iron extraction
- per tonne of titanium more energy is needed for extraction than iron
- iron can be extracted using carbon which is cheap
- wheareas titanium has to be extracted using chlorine and magnesium which is expensive
- titanium is a batch process whereas iron is a continuos process
|
|