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A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

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Lewis Acid

Any species that can accept a share in an electron pair.

Disproportionation Reactions

Redox reactions in which the oxidizing agent and the reducing agent are the same species.

Deposition

The direct solidification of a vapor by cooling, the reverse of sublimation.

Net Ionic Equation

Equation that results from canceling spectator ions and eliminating brackets from a total ionic equation.

Critical Mass

The minimum mass of a particular fissionable nuclide in a given volume required to sustain a nuclear chain reaction.

Domain

A cluster of atoms in a ferromagnetic substance, all of which align in the same direction in the presence of an external magnetic field.

Associated Ions

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

Heavy Water

Water containing deuterium, a heavy isotope of hydrogen.

Crystal Lattice Energy

Amount of energy that holds a crystal together, the energy change when a mole of solid is formed from its constituent molecules or ions (for ionic compounds) in their gaseous state.

Bronsted-Lowry Acid

A proton donor.