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Mach number
(Encyclopedia) Mach numberMach numbermäk [key] [for E. Mach], ratio between the speed of an object and the speed of sound in the medium in which the object is traveling. An airplane that has the…oxidation number
(Encyclopedia) oxidation number or oxidation state: see valence.octane number
(Encyclopedia) octane number, figure of merit representing the resistance of gasoline to premature detonation when exposed to heat and pressure in the combustion chamber of an internal-combustion…Avogadro's number
(Encyclopedia) Avogadro's numberAvogadro's numberävōgäˈdrō [key] [for Amedeo Avogadro], number of particles contained in one mole of any substance; it is equal to 602,252,000,000,000,000,000,000, or…number theory
(Encyclopedia) number theory, branch of mathematics concerned with the properties of the integers (the numbers 0, 1, −1, 2, −2, 3, −3, …). An important area in number theory is the analysis of prime…atomic number
(Encyclopedia) atomic number, often represented by the symbol Z, the number of protons in the nucleus of an atom, as well as the number of electrons in the neutral atom. Atoms with the same atomic…mass number
(Encyclopedia) mass number, often represented by the symbol A, the total number of nucleons (neutrons and protons) in the nucleus of an atom. All atoms of a chemical element have the same atomic…complex number
(Encyclopedia) complex number: see number.algebraic number
(Encyclopedia) algebraic number: see number.transcendental number
(Encyclopedia) transcendental number: see number.Trending
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