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A listing of metals (and hydrogen) in order of decreasing activity.

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Delocalization

Of electrons, refers to bonding electrons that are distributed among more than two atoms that are bonded together, occurs in species that exhibit resonance.
The formation of a set of molecular orbitals that extend over more than two atoms, important in species that valence bond theory describes in terms of resonance.

Hydrolysis Constant

An equilibrium constant for a hydrolysis reaction.

Neutralization

The reaction of an acid with a base to form a salt and water. Usually, the reaction of hydrogen ions with hydrogen ions to form water molecules.

Bronsted-Lowry Base

A proton acceptor

Cis-Trans Isomerism

A type of geometrical isomerism related to the angles between like ligands.

Standard Molar Volume

The volume occupied by one mole of an ideal gas under standard conditions, 22.4liters.

Flammable

A liquid as defined by NFPD and DOT as having a flash point below 37.8°C (100°F).

Ionic Geometry

The arrangement of atoms (not lone pairs of electrons) about the central atom of a polyatomic ion.

Homologous Series

A series of compounds in which each member differs from the next by a specific number and kind of atoms.

Absolute Entropy (of a substance)

The increase in the entropy of a substance as it goes from a perfectly ordered crystalline form at 0 °K (where its entropy is zero) to the temperature in question.

Entropy is a measure of the “dilution” of thermal energy.