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Arbitrary numbers that can be used as mechanical aids in writing formulas and balancing equations, for single- atom ions they correspond to the charge on the ion, more electronegative atoms are assigned negative oxidation numbers (also called Oxidation states).

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Yellowcake

The solid form of mixed uranium oxide, which is produced from uranium ore in the uranium recovery (milling) process.

Donor Atom

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

Ioniztion

The breaking up of a compound into separate ions.

Line Spectrum

An atomic emission or absorption spectrum.

Band of Stability

Band containing nonradioactive nuclides in a plot of number of neutrons versus atomic number.

Molar Solubility

Number of moles of a solute that dissolve to produce a litre of saturated solution.

Lanthanide Contraction

A decrease in the radii of the elements following the lanthanides compared to what would be expected if there were no f-transition metals.

Density

Density is the ratio b/w Mass and Volume: D=M/V

Natural Radioactivity

Spontaneous decomposition of an atom.

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.