C1.3 Metals

Question 1

alloys

Answer 1

mixtures of metals e.g steel
Alloys are harder than pure metals
alloys can be designed with different properties depending on the use.

Question 2

native metal

Answer 2

Metal found by itself naturally

Question 3

Method of extraction == mined as metal on its own

Answer 3

=used for very unreactive metals

=gold

Question 4

Method of extraction == reduction of metal ores using carbon

Answer 4

==used for metals less reactive than carbon

==e.g. iron

Question 5

Method of extraction == electrolysis

Answer 5

==used for metals lmore reactive than carbon
==expensive
==uses large amounts of energy
==e.g aluminium

Question 6

bioleaching

Answer 6

using bacteria to get solution of copper ions

Question 7

Phytomining

Answer 7

uses plants to absorb copper ions.The plants are then burnt and copper can be got out of the ash

Question 8

recycling benefits

Answer 8

-saves energy
reduces the need to mine ore
-conserves earths natural reserves of ores

Question 9

transition metals

Answer 9

==good conductors
===produces colour componds
==can be bent or hammered

Question 10

Advantage of mining

Answer 10

==habitat loss
==extra traffic

==energy
==noise pollution
==dust pollution