________ until aluminium are extracted by electrolysis only while after carbon they can be extracted by reduction with carbon while after hydrogen, they can be extracted by reduction with hydrogen.
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Sacrificial protection
The attaching of a more reactive metal with iron so it corrodes instead of iron, preventing rusting.
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Alloys
Mixture of metals with some other element, usually another metal or carbon.
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Pure metals
________ corrode far more easily than alloys.
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time consuming
Recycling of metals is an essential process which conserves energy and resources, but is expensive and ________.
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Reactivity series
The list of metals in order of decreasing reactivity.
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presence of water
Rusting is the corrosion of the metal iron in ________ and air.
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Metal
A solid material which is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity.
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Corrosion
A state of deterioration in metals caused by oxidation or chemical action.
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Haematite
The raw core of iron which is refined into the metal iron.
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Rusting
The corrosion of the metal iron in presence of water and air.
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Recycling
The act of processing used or abandoned materials for use in creating new products.
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