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Electron emitted from the nucleus when a neuton decays to a proton and an electron.

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Radioactive Dating

Method of dating ancient objects by determining the ratio of amounts of mother and daughter nuclides present in an object and relating the ratio to the object?s age via half-life calculations.

Equilibrium Constant

A quantity that characterizes the position of equilibrium for a reversible reaction, its magnitude is equal to the mass action expression at equilibrium. K varies with temperature.

Nucleus

The very small, very dense, positively charged center of an atom containing protons and neutrons, as well as other subatomic particles.

Covalent Bond

Chemical bond formed by the sharing of one or more electron pairs between two atoms.

Meniscus

The shape assumed by the surface of a liquid in a cylindrical container.

Hess' Law of Heat Summation

The enthalpy change for a reaction is the same whether it occurs in one step or a series of steps.

Electroplating

Plating a metal onto a (cathodic) surface by electrolysis.

Mass

A measure of the amount of matter in an object. Mass is usually measured in grams or kilograms.

Enantiomer

One of the two mirror-image forms of an optically active molecule.

What are Compound Microscopes?

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 the stage, with the illuminator below that.