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

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Hydration Energy

The energy change accompanying the hydration of a mole of gase and ions.

Molecular Weight

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

Ionic Bonding

Chemical bonding resulting from the transfer of one or more electrons from one atom or a group of atoms to another.

Adhesive Forces

Forces of attraction between a liquid and another surface.

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Concentration

Amount of solute per unit volume or mass of solvent or of solution.

Viscosity

Resistance offered by the molecules of a liquid to flow is termed as viscosity.

Ligand

A Lewis base in a coordination compound.

xanthate

A salt or ester of xanthic acid. Many xanthates have a yellow color. Xanthates are used as flotation agents in mineral processing.

van der Waals' Equation

An equation of state that extends the ideal gas law to real gases by inclusion of two empirically determined parameters, which are different for different gases.