C1.3 Metals and Their Uses 0.0 / 5 ChemistryMetals, metal ores and alloysGCSEAQA Created by: safiarofidiCreated on: 08-10-14 20:02 Economic Impacts of Exploiting Metal Ores Valuable revenue if mineral or its products are exported Wages earned go into the local economy Raw materials for industry Extracting low-grade ores is effectively a waste of money 1 of 7 Social Impacts of Exploiting Metal Ores Employment for local community Ruins the landscape Increase in local facilities promoted e.g. transport systems, and social facilities Noise from process of operation difficult to deal with (noise pollution) Useful products made from metal 2 of 7 Environmental Impacts of Exploiting Metal Ores Loss of wildlife habitat Mining-quarrying sites can be re-claimed and landscaped Disused quarries and mines increase hazards e.g. quarries filled with water Greenhouse gas emissions Noise pollution 3 of 7 Recycling Saves limited mineral resources Used metal items must be collected and transported to recycling centre 95% saving in energy Less noise and dust produced Different metals must be sorted and removed Reduces pollution (e.g. CO2) as burning less fossil fuels Saves different amounts of energy Less expensive Fewer scars on the landscape from less open cast mining 4 of 7 Properties of Transition Metals Between groups 2 and 3 in the periodic table Includes: iron, titanium + copper High density Good conductors of: Heat Electricity Ductile - can be stretched into wires Malleable - can be hammered into shape Sonorous - makes sound Shiny Some magnetic 5 of 7 The Structure of Metals Metals consist of giant structures of atoms arranged in a regular pattern- a lattice The electrons on the outer shell of metal atoms are delocalised (free to move through the structure) Thus they are good conductors of heat and electricity Held together with electrostatic forces of attraction/metallic bonds between delocalised electrons and positive metal ions Means they maintain regular structures, and usually have high melting and boiling points The regular layers allow atoms to slide over each other, so are malleable. 6 of 7 The Structure of Metals Cont. 7 of 7
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