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The arrangement of atoms (not lone pairs of electrons) about the central atom of a polyatomic ion.

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Chemical Equation

Description of a chemical reaction by placing the formulas of the reactants on the left and the formulas of products on the right of an arrow.

Alkaline Earth Metals

Group IIA metals

Alums

Hydrated sulfates of the general formula M+M3+(SO4)2.12H2).

Downs Cell

Electrolytic cell for the commercial electrolysis of molten sodium chloride. For further information see Electrochemistry or Fuel Cells.

Diagonal Similarities

Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.

Combination Reaction

Reaction in which two substances (elements or compounds) combine to form one compound.

Distillation

The separation of a liquid mixture into its components on the basis of differences in boiling points. The process in which components of a mixture are separated by boiling away the more volitile liquid.

Molecular Orbital Theory

A theory of chemical bonding based upon the postulated existence of molecular orbitals.

Daughter Nuclide

Nuclide that is produced in a nuclear decay.

 

Flammable

A liquid as defined by NFPD and DOT as having a flash point below 37.8°C (100°F).