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Change in the concentration of a reactant or product per unit time.

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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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Extensive Property

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

Octet Rule

Many representative elements attain at least a share of eight electrons in their valence shells when they form molecular or ionic compounds, there are some limitations.

Hybridization

Mixing a set of atomic orbitals to form a new set of atomic orbitals with the same total electron capacity and with properties and energies intermediate between those of the original unhybridized orbitals.

Fast Neutron

A neutron ejected at high kinetic energy in a nuclear reaction.

Boyle's Law

At constant temperature the volume occupied by a definite mass of a gas is inversely proportional to the applied pressure.

Absolute Zero

The zero point on the absolute temperature scale, -273.15°C or 0 K, theoretically, the temperature at which molecular motion ceases. The concept of an absolute zero temperature was first deduced from experiments with gases. When a fixed volume of gas is cooled, its pressure decreases with its temperature. Absolute zero physically possesses quantum mechanical zero-point energy.

Molecular Formula

Formula that indicates the actual number of atoms present in a molecule of a molecular substance.

xylan

The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.

Atomic Radius

Radius of an atom.

Accuracy

How closely a measured value agrees with the correct value.