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The combination of critical temperature and critical pressure of a substance.

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    One of the most interesting and obvious chemical experiments is the experiment on the interaction of copper sulfate and calcium carbonate. The latter is contained in the shell of a simple egg, but copper sulphate should be searched in a chemical reagent store. This experience is simple, but...

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    The most famous type of garnet stone is pyrope (flaming). This is the "oldest of garnets", with a dense red color, similar to the grain of an edible garnet. Pyrope has a variety called rhodolite - a stone of dense pink or pink-purple color, which sometimes has the alexandrite effect and is used in...



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Contact Process

Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

Pauli Exclusion Principle

No two electrons in the same atom may have identical sets of four quantum numbers.

Electrodes

Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.

Valence Bond Theory

Assumes that covalent bonds are formed when atomic orbitals on different atoms overlap and the electrons are shared.

Canal Ray

Stream of positively charged particles (cations) that moves toward the negative electrode in cathode ray tubes, observed to pass through canals in the negative electrode.

Line Spectrum

An atomic emission or absorption spectrum.

Electron Configuration

Specific distribution of electrons in atomic orbitals of atoms or ions.

Neutron

A neutral subatomic particle having a mass of 1.0087 amu.

Metalloids

Elements with properties intermediate between metals and nonmetals: B, Al, Si, Ge, As, Sb, Te, Po, and At.