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A substance that conducts electricity poorly in a dilute aqueous solution.

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Crystal Lattice

A pattern of arrangement of particles in a crystal.

Moderator

A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.

Dipole

Refers to the separation of charge between two covalently bonded atoms.

Oxidation

An algebraic increase in the oxidation number, may correspond to a loss of electrons.

Critical Temperature

The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.

Reducing Agent

The substance that reduces another substance and is oxidized.

Activity Series

A listing of metals (and hydrogen) in order of decreasing activity.

Joule

A unit of energy in the SI system. One joule is 1 kg. m2/s2 which is also 0.2390 calorie.

Electrophile

Positively charged or electron-deficient.

Viscosity

Resistance offered by the molecules of a liquid to flow is termed as viscosity.