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

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Henry's Law

The pressure of the gas above a solution is proportional to the concentration of the gas in the solution.

Exothermic

Describes processes that release heat energy.

Fuel Cells

Voltaic cells in which the reactants (usually gases) are supplied continuously.
A voltaic cell that converts the chemical energy of a fuel and an oxidizing agent directly into electriacl energy on a continuous basis.

Saturated Solution

Solution in which no more solute will dissolve.

Autoionization

An ionization reaction between identical molecules.

Conjugate Acid-base Pair

In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.

Thermal Cracking

Decomposition by heating a substance in the presence of a catalyst and in the absence of air.

 

Gas of rotten eggs

If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.

Paramagnetism

Attraction toward a magnetic field, stronger than diamagnetism, but still weak compared to ferromagnetism.

Electromagnetic Radiation

Energy that is propagated by means of electric and magnetic fields that oscillate in directions perpendicular to the direction of travel of the energy.