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Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

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Molecular Weight

The mass of one molecule of a nonionic substance in atomic mass units.

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.

Coordination Compound or Complex

A compound containing coordinate covalent bonds.

Halogens

Group VIIA elements: F, Cl, Br, I

Haber Process

A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

Buret

A piece of volumetric glassware, usually graduated in 0.1-mL intervals, that is used to deliver solutions to be used in titrations in a quantitative (dropwise) manner.

Binary Acid

A binary compound in which H is bonded to one or more of the more electronegative nonmetals.

Associated Ions

Short-lived species formed by the collision of dissolved ions of opposite charges.

Artificial Transmutation

An artificially induced nuclear reaction caused by the bombardment of a nucleus with subatomic particiles or small nucei.