Combination of symbols that indicates the chemical composition of a substance.
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The scanning tunneling microscope (STM) invented by Heinrich Rohrer and Gerd Binnig in the 1980s still manages to do a great job today and competes with more advanced microscope types. The scanning tunneling microscope is used for studying the surface atoms that are found on various materials. The...
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Peroxide
A compound containing oxygen in the -1 oxidation state. Metal peroxides contain the peroxide ion, O22
Ideal Gas Law
The product of pressure and the volume of an ideal gas is directly proportional to the number of moles of the gas and the absolute temperature.
Sublimation
The direct vaporization of a sold by heating without passing through the liquid state.
Strong Electrolyte
A substance that conducts electricity well in a dilute aqueous solution.
Ampere
Unit of electrical current, one ampere equals one coulomb per second.
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.
Heterogeneous Catalyst
A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.
Square Planar Complex
Complex in which the metal is in the center of a square plane, with ligand donor atoms at each of the four corners.
Kinetic-molecular Theory
A theory, that attempts to explain macroscopic observations on gases in microscopic observations on gases in microscopic observations on gases in microscopic or molecular terms.
Deposition
The direct solidification of a vapor by cooling, the reverse of sublimation.
