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The direct vaporization of a sold by heating without passing through the liquid state.

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    Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is...



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Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

Proton

A subatomic particle having a mass of 1.0073 amu and a charge of +1, found in thew nuclei of atoms.

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Half-Reaction

Either the oxidation part or the reduction part of a redox reaction.

Acidic Salt

A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

Chemical Periodicity

The variations in properties of elements with their position in the periodic table.

Density

Density is the ratio b/w Mass and Volume: D=M/V

High Spin Complex

Crystal field designation for an outer orbital complex, all t2g and eg orbitals are singly occupied before any pairing occurs.

Periodic Table

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Conjugated Double Bonds

Double bonds that are separated from each other by one single bond -C=C-C=C-.