Octet rule
the observation that atoms of nonmetals form the most stable molecules when they are surrounded by eight electrons (to fill their valence orbitals)
Subject:
Chemistry
Forum reference:
Book page:
http://course-notes.org/Chemistry
Nuclide
the general term applied to each unique atom; represented by X, where X is the symbol for a particular element
Subject:
Nucleus
the small, dense center of positive charge in an atom
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Nucleon
a particle in an atomic nucleus, either a neutron or a proton
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Nuclear transformation
the change of one element into another
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Nuclear atom
the modern concept of the atom as having a dense center of positive charge (the nucleus) and electrons moving around the nucleus
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Normality
the number of equivalents of a substance dissolved in a liter of solution
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Normal melting/freezing point
the melting/freezing point of a solid at a total pressure of one atmosphere
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Normal boiling point
the temperature at which the vapor pressure of a liquid is exactly one atmosphere; the boiling temperature under one atmosphere of pressure
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Nonmetal
an element that does not exhibit metallic characteristics.Chemically, a typical nonmetal accepts electrons from a metal
Subject:
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