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A substance that does not conduct electricity at low temperatures but does so at higher temperatures.

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Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

Atomic Orbital

Region or volume in space in which the probability of finding electrons is highest.

Free Energy Change

The indicator of spontaneity of a process at constnt T and P. If delta-G is negative, the process is spontaneous.

Hydride

A binary compound of hydrogen.

 

Homogeneous Catalyst

A catalyst that exists in the same phase (solid, liquid or gas) as the reactants. The process is called Homogeneous Catalysis.

Anode

In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.

Binding Energy (nuclear binding energy)

The energy equivalent (E = mc^2) of the mass deficiency of an atom.  where: E = is the energy in joules, m is the mass in kilograms, and c is the speed of light in m/s^2

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.

Linkage Isomers

Isomers in which a particular ligand bonds to a metal ion through different donor atoms.

 

Photon

A packet of light or electromagnetic radiation, also called quantum of light.