The reaction of a substance with water or its ions.
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Band
A series of very closely spaced, nearly continuous molecular orbitals that belong to the crystal as a whole.
Compound
A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.
Ground State
The lowest energy state or most stable state of an atom, molecule or ion.
Catalyst
A substance that speeds up a chemical reaction without being consumed itself in the reaction.
A substance that alters (usually increases) the rate at which a reaction occurs.
Electrodes
Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.
Ferromagnetism
The ability of a substance to become permanently magnetized by exposure to an external magnetic field.
Anion
A negative ion, an atom or goup of atoms that has gained one or more electrons.
Alkaline Earth Metals
Group IIA metals
Hydrometer
A device used to measure the densities of liquids and solutions.
Period
The elements in a horizontal row of the periodic table.
