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Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.

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Hydration

Reaction of a substance with water.

Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Atom

The smallest particle of an element.

van der Waals' Equation

An equation of state that extends the ideal gas law to real gases by inclusion of two empirically determined parameters, which are different for different gases.

Solvent

The dispersing medium of a solution.

Suspension

A heterogeneous mixture in which solute-like particles settle out of solvent-like phase some time after their introduction.

Octahedral

A term used to describe molecules and polyatomic ions that have one atom in the center and six atoms at the corners of a octahedron.

Isomorphous

Refers to crystals having the same atomic arrangement.

Beta Particle

Electron emitted from the nucleus when a neuton decays to a proton and an electron.

Halogens

Group VIIA elements: F, Cl, Br, I