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Spontaneous decomposition of an atom.

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Homogeneous Mixture

A mixture which has uniform composition and properties throughout.

Heisenberg Uncertainty Principle

It is impossible to determine accurately both the momentum and position of an electron simultaneously.

Paramagnetism

Attraction toward a magnetic field, stronger than diamagnetism, but still weak compared to ferromagnetism.

Strong Field Ligand

Ligand that exerts a strong crystal or ligand electrical field and generally forms low spin complexes with metal ions when possible.

Deposition

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

Saturated Solution

Solution in which no more solute will dissolve.

Compressed Gas

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

Lanthanides

Elements 58 to 71 (after lanthanum).

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

Solubility Product Constant

Equilibrium constant that applies to the dissolution of a slightly soluble compound.