Chemical Properties of Metals
Introduction:
Metals are defined as the elements having atoms arranged in rows. The electrons are easily released from metal atoms. Thus the layers of metal atoms exist in an 'ocean' of electrons. I like to share this Biological Molecule with you all through my article.
Examples:
They are iron, copper, lead, zinc, gold, magnesium.
Chemical Properties of Metals:
Some metals are more reactive than other metals. Thus very reactive metals lose electrons easily than the others. Metals such as Sodium are very reactive and it is flammable in air. Metals such as Gold are very non-reactive, and thus they don’t corrode or tarnish in air.
CHEMICAL REACTIONS OF METALS:
Metal + Acid = Salt + Hydrogen
Metal + Oxygen = Metal Oxide
Metal + Water = Metal Hydroxide + Hydrogen
Activity Series of Metals:
Activity series of metals lists the most reactive metals. (e.g. potassium(K) and sodium(Na)) to the least reactive (e.g. gold(Au)).
Corrosion
It is the process occurs when a metal reacts with air, water or other substances in its surroundings. Examples: the rusting of iron in oxygen to form iron oxide, and the green tarnish on copper. Understanding Electromagnetic Spectrum Waves is always challenging for me but thanks to all math help websites to help me out.
Ways to Prevent Corrosion:
Painting:
To prevent contact between the metal and oxygen.
Coating:
Coating with Plastic, Oil, Grease or Tar - to prevent oxygen contact with the metal. Coating with Metal - Galvanising iron with zinc.
Sacrificial Protection :
This process enclosing a metal to be protected with a more reactive metal which will corrode first.
REFINING METALS:
After the mining process, the metal is to be extracted or refined from the mineral. Smelting method plays a key role in refining of metals.
Smelting in a Blast Furnace
A blast furnace is a huge oven where minerals are roasted to form a metal oxide and then reacted with coke [a purest form of coal containing carbon] to extract the refined metal. Limestone is added frequently to the blast furnace to remove the impurities(slag).
Smelting :
In this process lead is extracted from its mineral ore (Galena PbS). The galena is roasted and then reacted with the oxygen to remove the sulphur impurities.
Lead Sulphide (Galena PbS ) + Oxygen(O2) = Lead Oxide(PbO) + Sulphur Dioxide(SO2).
Lead Oxide(PbO) + Carbon(C) = Lead(Pb) + Carbon Dioxide(CO2)
Metals are defined as the elements having atoms arranged in rows. The electrons are easily released from metal atoms. Thus the layers of metal atoms exist in an 'ocean' of electrons. I like to share this Biological Molecule with you all through my article.
Examples:
They are iron, copper, lead, zinc, gold, magnesium.
Chemical Properties of Metals:
Some metals are more reactive than other metals. Thus very reactive metals lose electrons easily than the others. Metals such as Sodium are very reactive and it is flammable in air. Metals such as Gold are very non-reactive, and thus they don’t corrode or tarnish in air.
CHEMICAL REACTIONS OF METALS:
Metal + Acid = Salt + Hydrogen
Metal + Oxygen = Metal Oxide
Metal + Water = Metal Hydroxide + Hydrogen
Activity Series of Metals:
Activity series of metals lists the most reactive metals. (e.g. potassium(K) and sodium(Na)) to the least reactive (e.g. gold(Au)).
Corrosion
It is the process occurs when a metal reacts with air, water or other substances in its surroundings. Examples: the rusting of iron in oxygen to form iron oxide, and the green tarnish on copper. Understanding Electromagnetic Spectrum Waves is always challenging for me but thanks to all math help websites to help me out.
Ways to Prevent Corrosion:
Painting:
To prevent contact between the metal and oxygen.
Coating:
Coating with Plastic, Oil, Grease or Tar - to prevent oxygen contact with the metal. Coating with Metal - Galvanising iron with zinc.
Sacrificial Protection :
This process enclosing a metal to be protected with a more reactive metal which will corrode first.
REFINING METALS:
After the mining process, the metal is to be extracted or refined from the mineral. Smelting method plays a key role in refining of metals.
Smelting in a Blast Furnace
A blast furnace is a huge oven where minerals are roasted to form a metal oxide and then reacted with coke [a purest form of coal containing carbon] to extract the refined metal. Limestone is added frequently to the blast furnace to remove the impurities(slag).
Smelting :
In this process lead is extracted from its mineral ore (Galena PbS). The galena is roasted and then reacted with the oxygen to remove the sulphur impurities.
Lead Sulphide (Galena PbS ) + Oxygen(O2) = Lead Oxide(PbO) + Sulphur Dioxide(SO2).
Lead Oxide(PbO) + Carbon(C) = Lead(Pb) + Carbon Dioxide(CO2)