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Refers to substances that crystallize in more than one crystalline arrangement.

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Isotopes

Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

Substitution Reaction

A reaction in which an atom or a group of atoms is replaced by another atom or group of atoms.

Molecular Orbital Theory

A theory of chemical bonding based upon the postulated existence of molecular orbitals.

Bomb Calorimeter

A device used to measure the heat transfer between system and surroundings at constant volume.

xenon

A heavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes. Symbol: Xe, at. wt.: 131.30, at. no.: 54.

Accuracy

How closely a measured value agrees with the correct value.

Thermal Cracking

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

 

20 interesting chemistry facts

20 interesting chemistry facts.

Extensive Property

A property that depends upon the amount of material in a sample.

Binary Compound

A compound consisting of two elements, may be ionic or covalent.