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Unsaturated hydrocarbons that contain one or more carbon-carbon double bonds.

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Electron Configuration

Specific distribution of electrons in atomic orbitals of atoms or ions.

Hydrate Isomers

Isomers of crystalline complexes that differ in whether water is present inside or outside the coordination sphere.

Daughter Nuclide

Nuclide that is produced in a nuclear decay.

 

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.

Critical Temperature

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

Law of Conservation of Matter and Energy

The total amount of matter and energy available in the universe is fixed.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Spectator Ions

Ions in a solution that do not participate in a chemical reaction.

Hydrometer

A device used to measure the densities of liquids and solutions.

Periodicity

Regular periodic variations of properties of elements with atomic number (and position in the periodic table).