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Assumes that covalent bonds are formed when atomic orbitals on different atoms overlap and the electrons are shared.

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Cathodic Protection

Protection of a metal (making ir a cathode) against corrosion by attaching it to a sacrifical anode of a more easily oxidized metal.

Contact Process

Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

Iron

Discovered : known to ancient civilisations.

Origin : The name comes from the Anglo-Saxon ‘iren’, and the symbol from the Latin ‘ferrum’, meaning iron.
Description :Iron is an enigma - it rusts easily and yet is the most important of all metals, world production exceeds 700 million tons a year. Small amounts of carbon are added to iron to produce steel and when chromium.
is added to this, the result is non-corroding stainless steel (small amounts of nickel may also be added). Iron is also an essential element for all forms of life. The average human contains about 4 grams, much of which circulates as haemoglobin in the blood, the job of which is to carry oxygen from our lungs to where it is needed. If the diet does not contain 10 milligrams a day, anaemia will eventually develop. Foods such as liver, kidney, molasses, brewer’s yeast, cocoa and liquorice contain a lot of iron.
Atomic No:26 Mass No:56

Alkynes

Unsaturated hydrocarbons that contain one or more carbon-carbon triple bonds.

20 interesting chemistry facts

20 interesting chemistry facts.

Cyclotron

A device for accelerating charged particles along a spiral path.

Weak Electrolyte

A substance that conducts electricity poorly in a dilute aqueous solution.

Specific Gravity

The ratio of the density of a substance to the density of water.

Ion

An atom or a group of atoms that carries an electric charge.

xylidine

Any of six isomeric compounds that have the formula C8H11N, are derivatives of xylene, and resemble aniline: used in dye manufacture.