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A region in which the probability of finding an electron is zero.

 

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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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    Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is...

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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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Secondary Standard

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

 

Composition Stoichiometry

Descibes the quantitative (mass) relationships among elements in compounds.

Artificial Transmutation

An artificially induced nuclear reaction caused by the bombardment of a nucleus with subatomic particiles or small nucei.

Reverse Osmosis

Forcing solvent molecules to flow through a semipermable membrane from a concentated solution into a dilute solution by the application of greater hydrostatic pressure on concentrated side than the osmotic pressure opposing it.

Mole Fraction

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

 

Diagonal Similarities

Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.

Electronic Transition

The transfer of an electron from one energy level to another.

Fat

Solid triester of glycerol and (mostly) saturated fatty acids.

Hydrolysis Constant

An equilibrium constant for a hydrolysis reaction.

Binary Acid

A binary compound in which H is bonded to one or more of the more electronegative nonmetals.