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A theory of chemical bonding based upon the postulated existence of molecular orbitals.

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Raoult's Law

The vapor pressure of a solvent in an ideal solution decreases as its mole fraction decreases.

Coefficient of expansion

The ratio of the change in length or volumen of a body to the original lengthor volume for a unit change in temperature.

Photochemical Oxidants

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

Crystal Lattice Energy

Amount of energy that holds a crystal together, the energy change when a mole of solid is formed from its constituent molecules or ions (for ionic compounds) in their gaseous state.

Isomers

Different substances that have the same formula.

Nucleons

Particles comprising the nucleus, protons and neutrons.

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.

Flammable

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

Nitric Acid

HNO3: A strong acid, it is toxic and can cause severe burns. Transparent colorless or yellowish, fuming, suffocating, caustic and corrosive liquid. Nitric acid boiling point is 83C. A 70 percent solution is used in the S.S.E. laboratory for junction depth measurements. Nitric acid is also present in the metal etch solution used for the Aluminum etch procedure.

Tyndall Effect

The scattering of light by colloidal particles.