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960 terms · page 26 of 40
Negative Deviation
Behaviour in which a solution exerts a lower vapour pressure than Raoult's law predicts.
Electrochemistry & RedoxNernst Equation
The equation relating a cell's potential to the concentrations of the species involved.
Stoichiometry & Chemical ReactionsNet Ionic Equation
An equation showing only the species that actually change during a reaction, with all spectator ions removed.
Acids, Bases & SaltsNeutral Salt
A salt whose aqueous solution has a pH of 7 because neither of its ions hydrolyses appreciably.
Acids, Bases & SaltsNeutral Solution
A solution in which the concentrations of hydrogen and hydroxide ions are exactly equal.
Stoichiometry & Chemical ReactionsNeutralisation Reaction
The reaction between an acid and a base to produce a salt and water.
Atomic Structure & PeriodicityNeutron
An electrically neutral subatomic particle found in the nucleus, with a mass slightly greater than that of a proton.
Nuclear & RadiochemistryNeutron Emission
The direct ejection of a neutron from an extremely neutron-rich nucleus.
Nuclear & RadiochemistryNeutron-to-Proton Ratio
The ratio of neutrons to protons in a nucleus, the principal determinant of its stability and decay mode.
Organic ChemistryNitrile
A compound containing a carbon–nitrogen triple bond.
Atomic Structure & PeriodicityNoble Gases
The group 18 elements, whose completely filled valence shells make them exceptionally unreactive.
Atomic Structure & PeriodicityNode
A region within an orbital where the probability of finding an electron falls to zero.
Solutions & Colligative PropertiesNon-Ideal Solution
A solution that departs from Raoult's law because interactions between unlike molecules differ from those between like molecules.
Solutions & Colligative PropertiesNormality
The concentration of a solution expressed as gram equivalents of solute per litre of solution.
Nuclear & RadiochemistryNuclear Binding Energy
The energy that would be required to separate a nucleus completely into its individual protons and neutrons.
Nuclear & RadiochemistryNuclear Chain Reaction
A self-sustaining sequence of fissions in which neutrons released by one event trigger further events.
Nuclear & RadiochemistryNuclear Chemistry
The study of changes that occur in atomic nuclei and of the properties of radioactive substances.
Nuclear & RadiochemistryNuclear Cross Section
A measure of the probability that a particular nuclear reaction will occur between a nucleus and an incident particle.
Nuclear & RadiochemistryNuclear Fission
The splitting of a heavy nucleus into two lighter nuclei with the release of neutrons and a large amount of energy.
Nuclear & RadiochemistryNuclear Fuel Enrichment
The process of increasing the proportion of a fissile isotope above its natural abundance.
Nuclear & RadiochemistryNuclear Fusion
The combining of light nuclei into a heavier one, releasing energy.
Nuclear & RadiochemistryNuclear Isomer
A nucleus in a long-lived excited state that decays to its ground state by gamma emission.
Analytical Chemistry & SpectroscopyNuclear Magnetic Resonance Spectroscopy
A technique that probes molecular structure using the resonance of atomic nuclei in a strong magnetic field.
Nuclear & RadiochemistryNuclear Reactor
A device in which a controlled nuclear chain reaction generates heat for power or produces radioisotopes.