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Reactions in which two compounds react to form two new compounds, with no changes in oxidation number. Reactions in which the ions of two compounds exchange partners.

 

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Standard Molar Enthalphy of Formation

The amount of heat absorbed in the formation of one mole of a substance in a specified state from its elements in their standard states.

Avogadro's Law

At the same temperature and pressure, equal volumes of all gases contain the same number of molecules.

Ether

Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.

Band

A series of very closely spaced, nearly continuous molecular orbitals that belong to the crystal as a whole.

Law of Conservation of Matter and Energy

The total amount of matter and energy available in the universe is fixed.

Dispersed Phase

The solute-like species in a colloid.

Octet Rule

Many representative elements attain at least a share of eight electrons in their valence shells when they form molecular or ionic compounds, there are some limitations.

Mixture

A sample of matter composed of two or more substances, each of which retains its identity and properties.

Periodic Table

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Crystal Field Theory

Theory of bonding in transition metal complexes in which ligands and metal ions are treated as point charges, a purely ionic model, ligand point charges represent the crystal (electrical) field perturbing the metal?s d orbitals containing nonbonding electrons.