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Electrode at which reduction occurs in a cathode ray tube, the negative electrode.

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Graham's Law

The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.

Moderator

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

Atomic Mass Unit (amu)

One twelfth of a mass of an atom of the carbon-12 isotope, a unit used for stating atomic and formula weights, also called dalton.

London Forces

Very weak and very short-range attractive forces between short-lived temporary (induced) dipoles, also called dispersion Forces.

Radioactivity

The spontaneous disintegration of atomic nuclei.

Allotropes

Different forms of the same element in the same physical state.

Ioniztion

The breaking up of a compound into separate ions.

Amorphous Solid

A noncrystalline solid with no well-defined ordered structure.

Positron

A Nuclear particle with the mass of an electron but opposite charge.

Crystal Field Stabilization Energy

A measure of the net energy of stabilization gained by a metal ion's nonbonding d electrons as a result of complex formation.