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A change in which one or more new substances are formed.

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ytterbia

Ytterbia is a colorless compound, Yb2O3, used in certain alloys and ceramics. Also known as ytterbium oxide.

Amphoterism

The ability to react with both acids and bases.Ability of substance to act as either an acid or a base.

Double Bond

Covalent bond resulting from the sharing of four electrons (two pairs) between two atoms.

Transition State Theory

Theory of reaction rates that states that reactants pass through high-energy transition states before forming products.

Photochemical Oxidants

Photochemically produced oxidizing agents capable of causing damage to plants and animals.

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Law of Definite Proportions (Law of Constant Composition)

The law stating that a pure substance will always have the same percent by weight. Different samples of a pure compound always contain the same elements in the same proportions by mass.

Graham's Law

The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.

Ion Product for Water

Equilibrium constant for the ionization of water, Kw = [H3O+][OH-] =1.00 x 10-14 at 25 °C.

Crystal Field Stabilization Energy

A measure of the net energy of stabilization gained by a metal ion's nonbonding d electrons as a result of complex formation.