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The pressure required to liquefy a gas (vapor) at its critical temperature.

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Square Planar Complex

Complex in which the metal is in the center of a square plane, with ligand donor atoms at each of the four corners.

Exothermicity

The release of heat by a system as a process occurs.

Nodal Plane

A region in which the probability of finding an electron is zero.

 

Molecular Formula

Formula that indicates the actual number of atoms present in a molecule of a molecular substance.

Clay

A class of silicate and aluminosilicate minerals with sheet-like structures that have enormous surface areas that can absorb large amounts of water.

Alkali Metals

Metals of Group IA (Na, K, Rb).

Quantum Mechanics

Mathematical method of treating particles on the basis of quantum theory, which assumes that energy (of small particles) is not infinitely divisible.

Dissociation

In aqueous solution, the process in which a solid ionic compound separates into its ions.

Electromagnetic Radiation

Energy that is propagated by means of electric and magnetic fields that oscillate in directions perpendicular to the direction of travel of the energy.

Half-Life

The time required for half of a reactant to be converted into product(s). The time required for half of a given sample to undergo radioactive decay.