Metals

by SuperMario
Last updated 5 years ago

Discipline:
Science
Subject:
Chemistry

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Metals

Physical Properties of Metals

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Alloys

Recycling Metals

Recycling metals is when scrap metals are collected and remolded. This help save the natural resources of metal ores as they are limited and can run out one day. Recycling metals help -save the cost of extracting metals from ores-conserve valuable and limited metals -reduce waste due to the disposal of unwanted metal-prevent the leeching of chemicals into the soil, leading to land pollutionHowever,-metals will only be recycled if the process of recycling is cheaper than the process of extracting new metals from ores-recycling metals can release harmful gases which pollutes the air-the cost of transporting the scrap metals to the recycling plants is expensive-not everyone will throw used metals into the recycling bins

Reactivity of Metals

The metal reactivity series is a list of metals arranged according to their reactiveness.The list of order of metals in the reactivity series arePotassium, Sodium, Calcium, Magnesium, Aluminium, Carbon, Zinc, Iron, Lead, Hydrogen, Copper, Silver and GoldMetals react with cold water, steam, and dilute acid.The reactivity series can helps to find out the reactions between metals and hydrogen, the effect of heat on metal carbonate, the way the metals are extracted and the way metals can be prevented from corrosionThe more reactive the metals, the easier it corrodes or lose electrons; the less reactive the metals, the harder it corrodes or lose electrons. The displacement reaction of metals is a reaction where a more reactive metal displaces a less reactive metal from its compound. The atom of the more reactive metal will lose electrons easier and dissolve into the compound; the atom of the less reactive metal will gain electron and discharge from the compound as an element.

Extraction of metals


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