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Crystal field designation for an outer orbital complex, all t2g and eg orbitals are singly occupied before any pairing occurs.

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Actinides

Elements 89 to 103 (between lawrencium and actinium) on the periodic table. Only the first four have been found in nature in appreciable amounts. The remainder have been produced synthetically.

Molecular Weight

The mass of one molecule of a nonionic substance in atomic mass units.

Shielding Effect

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.

Dermal toxicity

Adverse health effects resulting from skin exposure ot a substance.

Diamagnetism

Weak repulsion by a magnetic field.

Polydentate

Refers to ligands with more than one donor atom.

Secondary Standard

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

 

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

Saturated Hydrocarbons

Hydrocarbons that contain only single bonds. They are also called alkanes or paraffin hydrocarbons.

Heisenberg Uncertainty Principle

It is impossible to determine accurately both the momentum and position of an electron simultaneously.