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The spontaneous disintegration of atomic nuclei.

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Square Planar

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

Deposition

The direct solidification of a vapor by cooling, the reverse of sublimation.

Catenation

Bonding of atoms of the same element into chains or rings.
The bonding together of atoms of the same element to form chains.
The ability of an element to bond to itself.

Chemical Periodicity

The variations in properties of elements with their position in the periodic table.

Hydride

A binary compound of hydrogen.

 

First Law of Thermodynamics

The total amount of energy in the universe is constant (also known as the Law of Conservation of Energy) energy is neither created nor destroyed in ordinary chemical reactions and physical changes.

Natural Radioactivity

Spontaneous decomposition of an atom.

Cell Potential

Potential difference, Ecell, between oxidation and reduction half-cells under nonstandard conditions.

 

Nodal Plane

A region in which the probability of finding an electron is zero.

 

Reaction Stoichiometry

Description of the quantitative relationships among substances as they participate in chemical reactions.