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Nuclide that is produced in a nuclear decay.

 

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Ground State

The lowest energy state or most stable state of an atom, molecule or ion.

Substance

Any kind of matter all specimens of which have the same chemical composition and physical properties.

 

Aufbau ('building up') Principle

Describes the order in which electrons fill orbitals in atoms.

Valence Electrons

Outermost electrons of atoms, usually those involved in bonding.

K Capture

Absorption of a K shell (n=1) electron by a proton as it is converted to a neutron.

Coordination Compound or Complex

A compound containing coordinate covalent bonds.

Amorphous Solid

A noncrystalline solid with no well-defined ordered structure.

Crystalline Solid

A solid characterized by a regular, ordered arrangement of particles.

Radioactivity

The spontaneous disintegration of atomic nuclei.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.