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A gas or mixture of gases having, in a container an absolute pressure exceeding 40 psi at 21.1°C (70°F)


A gass or mixture having in a container, an absolute pressure exceeding 104 psi at 54.4°C (130°F) regardless of the pressure at (21.1°C (70°F)
A liquid having a vapour pressure exceeding 40 psi at 37.8°C (70°F) as determined by ASTM D-323-72.

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Period

The elements in a horizontal row of the periodic table.

Collision Theory

Theory of reaction rates that states that effective collisions between reactant molecules must occur in order for the reaction to occur.

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Chemical Kinetics

The study of rates and mechanisms of chemical reactions and of the factors on which they depend.

Alpha Particles

A helium nucleus.

Creating Malachite egg

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 effective and visual, and as a result we will get something beautiful.

Exothermic

Describes processes that release heat energy.

Extensive Property

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

Boron Hydrides

Binary compounds of boron and hydrogen.

Formal Charge

A method of counting electrons in a covalently bonded molecule or ion, counts bonding electrons as though they were equally shared between the two atoms.