Word: dinger
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Dates: during 1930-1939
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...quantum mechanics retains it. Although it is a tremendously powerful approach to atomic behavior, quantum mechanics is shot through with uncertainty. It has given birth to the Uncertainty Principle of Heisenberg, which states that the position and velocity of an electron cannot be simultaneously ascertained. In the Schrödinger wave mechanics, the little symbol ψ is important. It stands, roughly, for statistical probability. Instead of locating the electron, it locates a region in which the electron probably occurs...