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Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

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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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Lead Storage Battery

Secondary voltaic cell used in most automobiles.

xenon tetrafluoride

A colorless, crystalline compound, XeF4, prepared by heating a gaseous mixture of fluorine and xenon.

Mother Nuclide

Nuclide that undergoes nuclear decay.

Alkylbenzene

A compound containing an alkyl group bonded to a benzene ring.

Pairing Energy

Energy required to pair two electrons in the same orbital.

Matter

Anything that has mass and occupies space.

Saponification

Hydrolysis of esters in the presence of strong soluable bases.

Hybridization

Mixing a set of atomic orbitals to form a new set of atomic orbitals with the same total electron capacity and with properties and energies intermediate between those of the original unhybridized orbitals.

London Forces

Very weak and very short-range attractive forces between short-lived temporary (induced) dipoles, also called dispersion Forces.

Zone Refining

A method of purifying a bar of metal by passing it through an induction heater, this causes impurties to move along a melted portion. This method applies the fact when a metal crystallizes on cooling, impurities are automatically expelled as they do not form part of the crystal.