Refining of metals means purification of metals. Depending upon the nature of the metal and the nature of the impurities, present different methods are applied for the refining of metals. Some of the commonly used methods are discussed below:
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The important physical properties of non-metals are discussed below: Non-metals are generally brittle and hence cannot be beaten into sheets or drawn into wires. In other words, non-metals are non-malleable and non-ductile. Where stress is applied on non-metals, they shatter into pieces.
Some metals such as sodium, potassium, calcium, magnesium, iron and copper play a vital role in the living systems. Sodium and potassium are the most common cations in biological fluids. These ions are involved in the electrical activity in nerves and in muscle contraction.
Sometimes, we require metals in a stare high purity. For example, Uranium metal to be used in nuclear reactors as fuel should not contain boron more than one part per million (1 ppm) because it can capture neutrons.
Metals are hard substances. They are ductile, malleable, sonorous and good conductors of heat and electricity. Metals are electropositive in nature. Non-metals are brittle and electronegative in nature.