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An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

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Hydrate Isomers

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

Indicators

For acid-base titrations, organic compounds that exhibit different colors in solutions of different acidities, used to determine the point at which reaction between two solutes is complete.

Alkynes

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

Polarization

The buildup of a product of oxidation or a reduction of an electrode, preventing further reaction.

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.

Isotopes

Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

Melting Point

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

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Ester

A Compound of the general formula R-C-O-R1 where R and R1 may be the same or different, and may be either aliphatic or aromatic.

Endothermicity

The absorption of heat by a system as the process occurs.