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Absorption of a K shell (n=1) electron by a proton as it is converted to a neutron.

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Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Partial Pressure

The pressure exerted by one gas in a mixture of gases.

Catalyst

A substance that speeds up a chemical reaction without being consumed itself in the reaction.
A substance that alters (usually increases) the rate at which a reaction occurs.

Concentration

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

Limiting Reactant

Substance that stoichiometrically limits the amount of product(s) that can be formed.

Sublimation

The direct vaporization of a sold by heating without passing through the liquid state.

Gem-dimethyl group

Two methyl groups of the same carbon atom.

Dosimeter

A small, calibrated electroscope worn by laboratory personnel and designated to detect and measure incident ionizing radiation or chemical exposure.

Paramagnetism

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