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

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Lanthanides

Elements 58 to 71 (after lanthanum).

Raoult's Law

The vapor pressure of a solvent in an ideal solution decreases as its mole fraction decreases.

Critical Point

The combination of critical temperature and critical pressure of a substance.

Chemical Periodicity

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

Hydrate Isomers

Isomers of crystalline complexes that differ in whether water is present inside or outside the coordination sphere.

Natural Radioactivity

Spontaneous decomposition of an atom.

Nodal Plane

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

 

Atomic Orbital

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

Nuclear Reaction

Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

Atomic Mass Unit (amu)

One twelfth of a mass of an atom of the carbon-12 isotope, a unit used for stating atomic and formula weights, also called dalton.