CHEMISRTY 1

elliemcnaught
Mind Map by elliemcnaught, updated more than 1 year ago
elliemcnaught
Created by elliemcnaught about 5 years ago
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Mind Map on CHEMISRTY 1, created by elliemcnaught on 03/10/2015.

Resource summary

CHEMISRTY 1
1 ATOMIC STRUCTURE
1.1 electron charge: -1
1.2 proton charge: +1
1.3 neutron charge: 0
2 -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
3 LIMESTONE QUARRING has three different issues Environmental, Economic and Social
4 EXTRACTING METALS
4.1 -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
4.2 metal oxides + carbon -> metal + carbon dioxide
5 COMPOUND STEELS
5.1 - 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.
6 LOW ALLOY STEELS
6.1 -More expensive than carbon steels. -Contains between 1% and 5% of other metals. -Used for bike chains and suspension cables. -Strong.
7 -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.
8 -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
9 Sulphur dioxide causes acid rain.
10 COPPER is very unreactive.
11 ELECTROLYSIS is when ions are attracted to the negative electrode and deposited on the electrode as a copper metal.
12 TRANSITION METALS -In the centre of the periodic table. -All metals. -Unreactive. -Have a high density. -Conduct electricity and heat
13 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.
14 METALLIC STRUCTURE
14.1 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
14.2 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.
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