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In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.

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Law of Conservation of Matter

There is no detectable change in the quantity of matter during an ordinary chemical reaction.

xenon hexafluoride

A colorless, crystalline compound, XeF6, that melts at 50°C to a yellow liquid, and boils at 75°C.

Mole Fraction

The number of moles of a component of a mixture divided by the total number of moles in the mixture.


Differential Scanning Calorimetry (DSC)

A technique for measuring the temperature, direction, and magnitude of thermal transitions in a sample material by heating/cooling and comparing the amount of energy required to maintain its rate of temperature increase or decrease with an inert reference material under similar conditions.

Valence Bond Theory

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

Ideal Gas Law

The product of pressure and the volume of an ideal gas is directly proportional to the number of moles of the gas and the absolute temperature.

Total Ionic Equation

Equation for a chemical reaction written to show the predominant form of all species in aqueous solution or in contact with water.

Secondary Standard

A solution that has been titrated against a primary standard. A standard solution is a secondary standard.


K Capture

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


An algebraic increase in the oxidation number, may correspond to a loss of electrons.