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A spherically symmetrical atomic orbital, one per energy level.

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Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Alkali Metals

Metals of Group IA (Na, K, Rb).

History of diamonds

Diamond has been known for about 5 thousand years. Historians suggest that it was first discovered in India in river placers. It has long been credited with magical properties, and the largest famous crystals and products from them are shrouded in a halo of mystical legends.

Open Sextet

Refers to species that have only six electrons in the highest energy level of the central element (many Lewis acids).

Inner Orbital Complex

Valence bond designation for a complex in which the metal ion utilizes d orbitals for one shell inside the outermost occupied shell in its hybridization.

Nuclide Symbol

Symbol for an atom A/Z E, in which E is the symbol of an element, Z is its atomic number, and A is its mass number.

Coordination Isomers

Isomers involving exchanges of ligands between complex cation and complex anion of the same compound.

Heterocyclic Amine

Amine in which the nitrogen is part of a ring.

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

Donor Atom

A ligand atom whose electrons are shared with a Lewis acid.