The extraction of metals from low grade ores using plants. Plant roots absorb metals in the soil, the plants are then burnt to produce a metal rich ash. The metal is then separated from the ash.
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Define ALLOY
An alloy is a metal of 2 elements, 1 of which is an element.
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List 3 properties of a transition metal.
Form coloured compounds, have high melting points and high density
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What is an ore?
A metal oxide found in the earths crust which is economical to extract
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How are particles in a metal arranged?
In a lattice
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What is the difference between the atoms in a metal and those of an alloy?
Alloy has different atoms, this distorts the lattice and changes the properties of the metal. In a metal, the atoms are the same and arranged in a lattice.
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Describe 1 positive and 1 negative impact of quarrying iron ore.
Positive- creates jobs Negative- Can create air pollution
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Complete the sentence. Iron is extracted from its ore by...
REDUCTION
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What is a displacement reaction?
When a more reactive metal replaces a less reactive metal from a solution of one if it's salts.
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Other cards in this set
Card 2
Front
Define ALLOY
Back
An alloy is a metal of 2 elements, 1 of which is an element.
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