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A device for accelerating charged particles along a spiral path.

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Insoluble Compound

A very slightly soluble compound.

Compound

A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.

Equation of State

An equation that describes the behavior of matter in a given state, the van der Waals equation describes the behavior of the gaseous state.

Deposition

The direct solidification of a vapor by cooling, the reverse of sublimation.

Amphoterism

The ability to react with both acids and bases.Ability of substance to act as either an acid or a base.

Hund's Rule

All orbitals of a given sublevel must be occupied by single electrons before pairing begins.

Partial Pressure

The pressure exerted by one gas in a mixture of gases.

Three ways to make patina at home

The first way is ammonia patination. To do this, take a plastic container. Put a couple of paper or ordinary towels at the bottom. Moisten them with ammonia. Then sprinkle with large table salt.

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.

Compressed Gas

A gas or mixture of gases having, in a container an absolute pressure exceeding 40 psi at 21.1°C (70°F)