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A term used to describe molecules and polyatomic ions that have one atom in the center and six atoms at the corners of a octahedron.

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Acid

A substance that produces H+(aq) ions in aqueous solution. Strong acids ionize completely or almost completely in dilute aqueous solution. Weak acids ionize only slightly. Chemicals or substances having the property of an acid are said to be acidic.

Frequency

The number of repeating corresponding points on a wave that pass a given observation point per unit time.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Standard Molar Volume

The volume occupied by one mole of an ideal gas under standard conditions, 22.4liters.

Hydrocarbons

Compounds that contain only carbon and hydrogen.

Heat of Crystallization

The amount of heat that must be removed from one gram of a liquid at its freezing point to freeze it with no change in temperature.

Anode

In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.

Capillary

A tube having a very small inside diameter.

Dispersing Medium

The solvent-like phase in a colloid.

Percent Purity

The percent of a specified compound or element in an impure sample.