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Molecular orbital resulting from head-on overlap of two atomic orbitals.

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Reverse Osmosis

Forcing solvent molecules to flow through a semipermable membrane from a concentated solution into a dilute solution by the application of greater hydrostatic pressure on concentrated side than the osmotic pressure opposing it.

Octahedral

A term used to describe molecules and polyatomic ions that have one atom in the center and six atoms at the corners of a octahedron.

Molecular Orbital

An orbit resulting from overlap and mixing of atomic orbitals on different atoms. An MO belongs to the molecule as a whole.

Electronic Transition

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

Semiconductor

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

Oil

Liquid triester of glycerol and unsaturated fatty acids.

D -Transition elements (metals)

B Group elements except IIB in the periodic table, sometimes called simply transition elements EX. Fe, Ni, Cu, Ti .
For further information see Metals.

Molecular Equation

Equation for a chemical reaction in which all formulas are written as if all substances existed as molecules, only complete formulas are used.

Coordination Compound or Complex

A compound containing coordinate covalent bonds.

Atomic Radius

Radius of an atom.