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A binary compound of hydrogen.

 

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Molecular Formula

Formula that indicates the actual number of atoms present in a molecule of a molecular substance.

Le Chatelier's Principle

States that a system at equilibrium, or striving to attain equilibrium, responds in such a way as to counteract any stress placed upon it.
If a stress (change of conditions) is applied to a system at equilibrium, the system shifts in the direction that reduces stress.

Gem-dimethyl group

Two methyl groups of the same carbon atom.

Ionization Energy

The minimum amount of energy required to remove the most loosely held electron of an isolated gaseous atom or ion.

Oxidizing Agent

The substance that oxidizes another substance and is reduced.

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.

Rate of Reaction

Change in the concentration of a reactant or product per unit time.

Hund's Rule

All orbitals of a given sublevel must be occupied by single electrons before pairing begins.

Mole Fraction

The number of moles of a component of a mixture divided by the total number of moles in the mixture.

 

Equilibrium Constant

A quantity that characterizes the position of equilibrium for a reversible reaction, its magnitude is equal to the mass action expression at equilibrium. K varies with temperature.