All Chemicals - The Online Chemical Glossary

The Chemical Glossary currently has 651 chemical entries. You may search the Chemical Glossary by entering the keyword in the search box or by browsing the entire chemical glossary by letter in alphabetical order.

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Half-Cell
Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.
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.
Molecular Orbital
An orbit resulting from overlap and mixing of atomic orbitals on different atoms. An MO belongs to the molecule as a whole.
Fluids
Substances that flow freely, gases and liquids.
Matter
Anything that has mass and occupies space.
Percent Composition
The mass percent of each element in a compound.
Nonelectrolyte
A substance whose aqueous solutions do not conduct electricity.
Phosphoric Acid
H3P04, Colorless liquid or rhombic crystals, decomposes before it will boil. Used mostly in the metal etchant. Used in cleaning operations to remove...
Line Spectrum
An atomic emission or absorption spectrum.
Electron Deficient Compounds
Compounds that contain at least one atom (other than H) that shares fewer than eight electrons.

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