A substance at temperature above its critical temperature.
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Alkaline Earth Metals
Group IIA metals
Molecular Weight
The mass of one molecule of a nonionic substance in atomic mass units.
Combination Reaction
Reaction in which two substances (elements or compounds) combine to form one compound.
xenon trioxide
A colorless, nonvolatile solid, XeO3, explosive when dry: in solution it is called xenic acid.
Phase Diagram
Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.
Diagonal Similarities
Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.
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.
Denatured
A commercial term used to describe ethanol that has been rendered unfit for human consumption because of the addition of harmful ingredients to make it sales tax-expempt.
Silicones
Polymeric organosilicon compounds, contain individual or cross-linked Si-O chains or rings in which some oxygens of SiO4 tetrahedra are replaced by other groups.
Formula Weight
The mass of one formula unit of a substance in atomic mass units.
