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Electrons in filled sets of s , p orbitals between the nucleus and outer shell electrons shield the outer shell electrons somewhat from the effect of protons in the nucleus, also called screening effect.

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Tyndall Effect

The scattering of light by colloidal particles.

van der Waals' Equation

An equation of state that extends the ideal gas law to real gases by inclusion of two empirically determined parameters, which are different for different gases.

Rate of Reaction

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

Coordination Isomers

Isomers involving exchanges of ligands between complex cation and complex anion of the same compound.

Chemical Hygiene Plan (CHP)

A written program developed and implemented by an employer designating proceedures, equipment, personal protective equipment, and work practices that are capable of protecting employees from the health hazards presented by hazardous chemicals usid in that particular workplace.

Extensive Property

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

Doublet

Two peaks or bands of about equal intensity appearing close together on a spectrogram.

Allotropes

Different forms of the same element in the same physical state.

Levorotatory

Refers to an optically active substance that rotates the plane of plane polarized light counterclockwise, also called levo.

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.