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An ionization reaction between identical molecules.

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Metallic Bonding

Bonding within metals due to the electrical attraction of positively charges metal ions for mobile electrons that belong to the crystal as a whole.

Single Bond

Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.

Thermal Cracking

Decomposition by heating a substance in the presence of a catalyst and in the absence of air.

 

Graham's Law

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

Electronic Transition

The transfer of an electron from one energy level to another.

Valence Bond Theory

Assumes that covalent bonds are formed when atomic orbitals on different atoms overlap and the electrons are shared.

Intermolecular Forces

Forces between individual particles (atoms, molecules, ions) of a substance.

Haber Process

A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.

Percent Composition

The mass percent of each element in a compound.

Explosive limits

The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.