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Molecular orbital resulting from head-on overlap of two atomic orbitals.

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Allotropic Modifications (Allotropes)

Different forms of the same element in the same physical state.

Condensation

Liquefaction of vapor.

Double Bond

Covalent bond resulting from the sharing of four electrons (two pairs) between two atoms.

Carcinogen

A substance capable of causing or producing cancer in mammals.

 

Contact Process

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

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.

Solution

Homogeneous mixture of two or more substances.

Cathode

Electrode at which reduction occurs in a cathode ray tube, the negative electrode.

Proton

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

Faraday

One faraday of electricity corresponds to the charge on 6.022 x 1023 electrons, or 96,487.301 coulombs.