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Muonium (/ m juː ˈ oʊ n i ə m /) is an exotic atom made up of an antimuon and an electron, [1] which was discovered in 1960 by Vernon W. Hughes [2] and is given the chemical symbol Mu. During the muon's 2.2 µs lifetime, muonium can undergo chemical reactions.
Mu (/ ˈ m (j) uː /; [1] [2] uppercase Μ, lowercase μ; Ancient Greek μῦ, Greek: μι or μυ—both ) is the twelfth letter of the Greek alphabet, representing the voiced bilabial nasal IPA:. In the system of Greek numerals it has a value of 40. [ 3 ]
Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.
Micro (Greek letter μ, mu, non-italic) is a unit prefix in the metric system denoting a factor of 10 −6 (one millionth). [1] It comes from the Greek word μικρός (mikrós), meaning "small". [2] It is the only SI prefix which uses a character not from the Latin alphabet.
Gamma (symbol: γ) is a deprecated non-SI unit of mass equal to 1 μg. [2] A fullwidth version of the "microgram" symbol is encoded by Unicode at code point U+338D ㎍ SQUARE MU G for use in CJK contexts. [3] In other contexts, a sequence of the Greek letter mu (U+03BC) and Latin letter g (U+0067) should be used.
Mu is a lost continent introduced by Augustus Le Plongeon (1825–1908), who identified the "Land of Mu" with Atlantis. The name was subsequently identified with the hypothetical land of Lemuria by James Churchward (1851–1936), who asserted that it was located in the Pacific Ocean before its destruction. [ 1 ]
A muon (/ ˈ m (j) uː. ɒ n / M(Y)OO-on; from the Greek letter mu (μ) used to represent it) is an elementary particle similar to the electron, with an electric charge of −1 e and spin-1/2, but with a much greater mass.
The molar mass constant, usually denoted by M u, is a physical constant defined as one twelfth of the molar mass of carbon-12: M u = M(12 C)/12. [1] The molar mass of an element or compound is its relative atomic mass (atomic weight) or relative molecular mass (molecular weight or formula weight) multiplied by the molar mass constant.