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Describes the order in which electrons fill orbitals in atoms.

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Heat of Vaporization

The amount of heat required to vaporize one gram of a liquid at its boiling point with no change in temperature. Usually expressed in J/g. The molar heat of vaporization is the amount of heat required to vaporize one mole of liquid at its boiling point with no change in temperature and usually expressed ion kJ/mol.

Semiconductor

A substance that does not conduct electricity at low temperatures but does so at higher temperatures.

yttria

Y2O3: A white, water-insoluble powder, Y2O3, used chiefly in incandescent gas and acetylene mantles.

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

20 interesting chemistry facts

20 interesting chemistry facts.

Faraday's Law of Electrolysis

One equivalent weight of a substance is produced at each electrode during the passage of 96,487 coulombs of charge through an electrolytic cell.

Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

Structural Isomers

Compounds that contain the same number of the same kinds of atoms in different geometric arrangements.

Hund's Rule

All orbitals of a given sublevel must be occupied by single electrons before pairing begins.

Polymerization

The combination of many small molecules to form large molecules.