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An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

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Salt Bridge

A U-shaped tube containing electrolyte, which connects two half-cells of a voltaic cell.

Stereoisomers

Isomers that differ only in the way that atoms are oriented in space, consist of geometrical and optical isomers.

 

Nodal Plane

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

 

Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Emulsion

Colloidal suspension of a liquid in a liquid.

Ampere

Unit of electrical current, one ampere equals one coulomb per second.

 

Semipermable Membrane

A thin partition between two solutions through which certain molecules can pass but others cannot.

Phosphoric Acid

H3P04, Colorless liquid or rhombic crystals, decomposes before it will boil. Used mostly in the metal etchant. Used in cleaning operations to remove encrusted surface matter and mineral scale found on metal equipment such as boilers and steam producing equipment. Also used to brighten metals and remove rust.

Kinetic Energy

Energy that matter processes by virtue of its motion.

Salicylaldehyde

An oily, slightly water-soluble liquid, C7H6O2, having an almondlike odor: used chiefly in perfumery and in the synthesis of coumarin.