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A fairly strong dipole-dipole interaction (but still considerably weaker than the covalent or ionic bonds) between molecules containing hydrogen directly bonded to a small, highly electronegative atom, such as N, O, or F.

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Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.

Electronic Geometry

The geometric arrangement of orbitals containing the shared and unshared electron pairs surrounding the central atom of a molecule or polyatomic ion.

Isomers

Different substances that have the same formula.

Debye

The unit used to express dipole moments.

Structural Isomers

Compounds that contain the same number of the same kinds of atoms in different geometric arrangements.

Halogens

Group VIIA elements: F, Cl, Br, I

Molecular Weight

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

Donor Atom

A ligand atom whose electrons are shared with a Lewis acid.

Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.