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Nuclide that is produced in a nuclear decay.

 

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Hydrometer

A device used to measure the densities of liquids and solutions.

Band

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

Amphoterism

The ability to react with both acids and bases.Ability of substance to act as either an acid or a base.

Central Atom

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

Critical Temperature

The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.

Emulsifying Agent

A sustance that coats the particles of the dispersed phase and prevents coagulation of colloidal particles, an emulsifier.

Titration

A Procedure in which one solution is added to another solution until the chemical reaction between the two solutes is complete, the concentration of one solution is known and that of the other is unknown.

 

Carcinogen

A substance capable of causing or producing cancer in mammals.

 

Linkage Isomers

Isomers in which a particular ligand bonds to a metal ion through different donor atoms.

 

Explosive limits

The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.

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.

Quantum Mechanics

Mathematical method of treating particles on the basis of quantum theory, which assumes that energy (of small particles) is not infinitely divisible.

Standard Electrode Potential

By convention, potential, Eo, of a half-reaction as a reduction relative to the standard hydrogen electrode when all species are present at unit activity.

 

Atomic Number


Integral number of protons in the nucleus, defines the identity of element.
 

Fluorescence

Absorption of high energy radiation by a substance and subsequent emission of visible light.

End Point

The point at which an indicator changes colour and a titration is stopped.

Equilibrium or Chemical Equilibrium

A state of dynamic balance in which the rates of forward and reverse reactions are equal, the state of a system when neither forward or reverse reaction is thermodynamically favored.

Compound

A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.

Reactants

Substances consumed in a chemical reaction.

Basic Salt

A salt containing an ionizable OH group.