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Refers to the overall processes by which metals are extracted from ores.

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Neutralization

The reaction of an acid with a base to form a salt and water. Usually, the reaction of hydrogen ions with hydrogen ions to form water molecules.

Hydrogen

Discovered : by Henry Cavendish in 1766.
Isolated in London, UK.
Origin : The name is derived from the Greek ‘hydro genes’, meaning water forming.
Description :A colourless, odourless gas that burns and can form an explosive mixture with air. It is currently manufactured from methane gas, but is also produced by the electrolysis of water and aqueous salts. The gas is used to make such key materials as ammonia, cyclohexane and methanol, which are intermediates in the production of fertilisers, plastics and pharmaceuticals. Some see hydrogen gas as the clean fuel of the future - generated from water and returning to water when it is oxidised. Hydrogen-powered fuel cells are increasingly being seen as pollution-free sources of energy.

Chemistry of the sky

Chemistry can teach us about the composition of celestial bodies and determine their age.

Corrosion

Oxidation of metals in the presence of air and moisture.

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

Solution

Homogeneous mixture of two or more substances.

Charle's Law

At constant pressure the volume occupied by a definite mass of gas is directly proportional to its absolute temperature.

Base

A substance that produces OH (aq) ions in aqueous solution. Strong soluable bases are soluble in water and are completely dissociated. Weak bases ionize only slightly.

Band of Stability

Band containing nonradioactive nuclides in a plot of number of neutrons versus atomic number.

Ternary Compound

A compound consisting of three elements, may be ionic or covalent.