Metals Flashcards
Metallic bonds are very….
The metallic bonds form a …. structure as a ….
Strong, giant, crystal.
The free electrons allow metals to carry… And …. Making them good for ….
Heat, electricity.
Good conductors so ideal for electrical wiring and good as saucepans - heat can travel through.
Metals have a strong …. Strength making them strong and hard to ….
They are ideal for…
Tensile, break, bridges.
Metals are …. Meaning that…
Malleable - atoms slide over each other making metals ideal for hammering and rolling into sheets. Good for car bodies.
Metallic bonds are very strong making it difficult to break them. This gives metals high…
Boiling and melting points - bridges cannot melt in hot weather, saucepans cannot melt.
Minerals consist of solid elements and compounds. Ores consist of…
Varying minerals. Metals can be extracted from these.
Name two ores.
Haematite - iron (II) oxide - Fe2O3
Chalcopyrite - copper ore - CuFeS2. Copper iron sulfide.
Some metals make up small percentages of ores and so they have to be …
Extracted in greater quantities.
Give an example of reduction with carbon…
2Fe2O3 + 3C - 4Fe + 3Co2
The loss of oxygen is
Reduction
The gain of oxygen is
Oxidation
Metals less reactive than carbon have to be extracted by reduction as carbon can…
‘Displace’ the metal in the metal oxide. More reactive metals have to be extracted by electrolysis.
Most metals are reactive, excluding unreactive ones such as gold which can be extracted directly. More reactive metals are harder to … And so took longer to …
Extract, discover.
Carbon in wood can…
Reduce copper oxide.
How do metallic bonds work ?
Metallic bonds consist of protons being held together by the electrons from the outer shells of the metals - delocalised electrons. They hold the metals together.
