The relative order of tendencies for elements and their simple ions to act as oxidizing or reducing agents, also called the activity series.
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The most expensive metal in the world
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Background Radiation
Ratiation extraneous to an experiment. Usually the low-level natural radiation form cosmic rays and trace radioactive substances present in our environment.
Radioactive Tracer
A small amount of radioisotope replacing a nonradioactive isotope of the element in a compound whose path (for example, in the body) or whose decomposition products are to be monitored by detection of radioctivity, also called a radioactive label.
Levorotatory
Refers to an optically active substance that rotates the plane of plane polarized light counterclockwise, also called levo.
Deposition
The direct solidification of a vapor by cooling, the reverse of sublimation.
Native State
Refers to the occurrence of an element in an uncombined or free state in nature.
Doublet
Two peaks or bands of about equal intensity appearing close together on a spectrogram.
Pauli Exclusion Principle
No two electrons in the same atom may have identical sets of four quantum numbers.
Collision Theory
Theory of reaction rates that states that effective collisions between reactant molecules must occur in order for the reaction to occur.
Sigma Orbital
Molecular orbital resulting from head-on overlap of two atomic orbitals.