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Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.

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Enzyme

A protein that acts as a catalyst in biological systems.

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

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.

Heat of Condensation

The amount of heat that must be removed from one gram of a vapor at it's condensation point to condense the vapour with no change in temperature.

PseudobinaryIonic Compounds

Compounds that contain more than two elements but are named like binary compounds.

Electronic Transition

The transfer of an electron from one energy level to another.

London Forces

Very weak and very short-range attractive forces between short-lived temporary (induced) dipoles, also called dispersion Forces.

Halogens

Group VIIA elements: F, Cl, Br, I

Percent Composition

The mass percent of each element in a compound.

Hybridization

Mixing a set of atomic orbitals to form a new set of atomic orbitals with the same total electron capacity and with properties and energies intermediate between those of the original unhybridized orbitals.