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11 Cards in this Set
- Front
- Back
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List the nine properties of metals. |
Physical State, Lustre, Colour, Hardness, Malleability, Ductility, Thermal Conductivity, Electrical Condictivity, Sonority |
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What happens when 4Na reacts with O2? |
2Na2O is formed |
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What happens when a metal dioxide reacts with oxygen? |
An acid is formed |
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What happens when a metal dioxide reacts with water? |
A metal hydroxide and hydrogen gas is formed OR A metal oxide and hydrogen gas is formed |
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How is rust formed, and why is it an undesirable reaction? |
Rust is formed when iron reacts with oxygen and moisture present in the atmosphere.
The formation of rust is an undesirable reaction because when the rust falls off, it exposes the metal to further rusting.
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Why does copper get coated with a green substance after the passage of time? |
Copper reacts with carbon dioxide and moisture present in the atmosphere to produce basic copper carbonate, which is green in colour. |
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Why do silver objects become blackened?
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Silver objects get blackened because of the reaction of silver with hydrogen gas present in the atmosphere |
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2Al+ 6HCl= |
2ALCL3+ 3H2 |
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List the activity series of metals in order. |
Potassium Sodium Calcium Magnesium Aluminum Zinc Iron Tin Lead Hydrogen Copper Mercury Silver Gold Platinum |
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List some uses of metals |
Iron: automobiles, machinery, containers, etc God/Silver: ornaments Copper: Electric wires, cooking utensils, etc Zinc: As protective coat for iron Aluminum: as a foil, cables, cooking utensils, etc |
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List some uses of non-metals |
Hyrdrogen: the synthesis of ammonia and methyl alcohol, in welding torches, etc Sulphur: manufacture of sulpuric acid, and sulphates, in the production of matches, dyes, and gunpowder Graphite: In pencils, in zinc-carbon batteries, in brake linings Phosphorus: making glasses used in sodium lamps, in the fireworks industry
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