General chemistry

General chemistry

Industry: Chemistry

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General chemistry

Efflorescent

Chemistry; General chemistry

Efflorescent substances lose water of crystallisation to the air. The loss of water changes the crystal structure, often producing a powdery crust.

Molecular sieve

Chemistry; General chemistry

A material that contains many small cavities interconnected with pores of precisely uniform size. Zeolites are an example. Molecular sieves adsorb molecules that are small enough to pass through ...

Surroundings

Chemistry; General chemistry

In thermodynamics, the surroundings refer to the universe outside the system .

The lowest energy required to remove an electron from an atom, ion, or molecule in the gas phase. The adiabatic ionisation energy is the difference between the ground state energy of the ion formed ...

Nonmetal

Chemistry; General chemistry

A nonmetal is a substance that conducts heat and electricity poorly, is brittle or waxy or gaseous, and cannot be hammered into sheets or drawn into wire. Nonmetals gain electrons easily to form ...

Thixotropic fluid

Chemistry; General chemistry

A liquid that becomes less viscous when stirred. Paint and printing inks are thixotropic fluids; they are formulated so that they flow more freely when brushed or rolled.

Carbonyl

Chemistry; General chemistry

A divalent group consisting of a carbon atom with a double-bond to oxygen. For example, acetone (CH3-(C=O)-CH3) is a carbonyl group linking two methyl groups. Also refers to a compound of a metal ...