Very weak and very short-range attractive forces between short-lived temporary (induced) dipoles, also called dispersion Forces.
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xylic acid
Any of six colorless, crystalline, isomeric acids having the formula C9H10O2, derived from xylene.
Natural Radioactivity
Spontaneous decomposition of an atom.
xanthate
A salt or ester of xanthic acid. Many xanthates have a yellow color. Xanthates are used as flotation agents in mineral processing.
Continuous Spectrum
Spectrum that contains all wave-lengths in a specified region of the electromagnetic spectrum.
Quantum Numbers
Numbers that describe the energies of electrons in atoms, derived from quantum mechanical treatment.
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.
Spectrum
Display of component wavelengths (colours) of electromagnetic radiation.
Standard Reaction
A reaction in which the numbers of moles of reactants shown in the balanced equation, all in their standard states, are completely converted to the numbers of moles of products shown in the balanced equation, also sall at their standard state.
Combination Reaction
Reaction in which two substances (elements or compounds) combine to form one compound.
Barometer
A device for measuring pressure.
