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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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Equilibrium Constant

A quantity that characterizes the position of equilibrium for a reversible reaction, its magnitude is equal to the mass action expression at equilibrium. K varies with temperature.

Why do copper products change color, and what is the name of the process?

Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.

Critical Point

The combination of critical temperature and critical pressure of a substance.

Fluids

Substances that flow freely, gases and liquids.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.

Cathode Ray Tube

Closed glass tube containing a gas under low pressure, with electrodes near the ends and a luminescent screen at the end near the positive electrode, produces cathode rays when high voltage is applied.

Molecular Orbital Theory

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

Buret

A piece of volumetric glassware, usually graduated in 0.1-mL intervals, that is used to deliver solutions to be used in titrations in a quantitative (dropwise) manner.

Geiger counter

A gas filled tube which discharges electriaclly when ionizing radiation passes through it.

Supercritical Fluid

A substance at temperature above its critical temperature.