N

Nernst equation net ionic equation
network covalent solid neutralization reaction
neutron noble gas
nomenclature non-stoichiometric
nonbonding molecular orbital nonbonding pair
nonmetal nonpolar
normal boiling point normality
nuclear binding energy nuclear reactor
nucleic acid nucleophile
nucleotide nucleus
nuclide  




Nernst equation

The relationship between the standard cell potential and the cell potential under conditions of other concentrations and temperatures.


net ionic equation

The equation for a reaction in which strong electrolytes are written as their separate component ions and in which ions that are unchanged are omitted.


network covalent solid

A substance in which covalent bonds join atoms in a structure that extends indefinitely.


neutralization reaction

The reaction of an acid with a base to form water and a salt.


neutron

The uncharged particle in an atomic nucleus; its mass is similar to the mass of a hydrogen atom.


noble gas

One of the elements in the same column of the periodic table as helium; also called inert gas.


nomenclature

A system of names for identifying elements, ions, and compounds.


non-stoichiometric

Describing a compound for which the chemical formula varies over a limited range.


nonbonding molecular orbital

An orbital formed by the overlap of atomic orbitals having symmetry leading to no net overlap; comparable in energy to the atomic orbitals from which it is formed.


nonbonding pair

In a covalently bonded molecule or ion, a pair of electrons not involved in the formation of bonds.


nonmetal

An element that is not a metal; such elements include hydrogen and those in the upper right of the periodic table.


nonpolar

Describing a molecule having no separation of centers of positive and negative electrical charge that would make the molecule assume certain orientations more than others in an electric field.


normal boiling point

The temperature at which the vapor pressure of a liquid reaches a pressure of one atmosphere.


normality

The molarity of a solution multiplied by the number of moles of that substance that occur in a chemical equation.


nuclear binding energy

The energy released as particles are brought together to form a nucleus.


nuclear reactor

A device for obtaining energy from a sustained fission (or, perhaps in the future, fusion) reaction.


nucleic acid

A biological polymer composed of nucleotides; DNA and RNA are nucleic acids.


nucleophile

A species that in its reactions seeks positive charge; bases are typically nucleophiles.


nucleotide

One of the organic base-sugar-phosphate combinations that is a monomer for DNA or RNA.


nucleus

The massive collection of protons and neutrons at the center of an atom.


nuclide

An atom having a set number of protons and neutrons.



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