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Vor 2 Tagen · Chemical bonds between atoms were explained by Gilbert Newton Lewis, who in 1916 proposed that a covalent bond between two atoms is maintained by a pair of electrons shared between them. Later, in 1927, Walter Heitler and Fritz London gave the full explanation of the electron-pair formation and chemical bonding in terms of quantum ...
- stable ( > 6.6×10²⁸ yr)
- J. J. Thomson (1897)
- e−, β−
- −1 e, −1.602176634×10−19 C
Vor einem Tag · Photoelectric effect: the emission of electrons from a metal plate caused by light quanta – photons 1926 Gilbert N. Lewis letter which brought the word "photon" into common usage. The word quanta (singular quantum, Latin for how much) was used before 1900 to mean particles or amounts of different quantities, including electricity.
Vor 2 Tagen · An illustration of Newton's method. In numerical analysis, Newton's method, also known as the Newton–Raphson method, named after Isaac Newton and Joseph Raphson, is a root-finding algorithm which produces successively better approximations to the roots (or zeroes) of a real -valued function.
Vor 4 Tagen · Concepts of empathy, sympathy and compassion are often confused in a variety of literatures. This article proposes a pattern-theoretic approach to distinguishing compassion from empathy and sympathy. Drawing on psychology, Western philosophy, affective neuroscience, and contemplative science, we clarify the nature of compassion as a specific pattern of dynamically related factors that include ...
Vor einem Tag · Your TV GPS, Globe TV critic Matthew Gilbert’s look at the week ahead in television, appears every Monday morning on BostonGlobe.com. Today’s column covers May 13-19. Yup, there’s a new ...
Vor 2 Tagen · Brunhilde is of course angry and seeks vengeance. Our hero passes up an opportunity to give the ring back to the Rhinegold maidens but refuses and soon is killed by treachery. Brunhilde joins him on the funeral pyre as the age of the gods passes away for all time. The ring is taken by Hagen who is himself lured by the maidens into the water ...
Vor einem Tag · This one stars André Holland, so good in “The Knick,” as Black Panther leader Huey P. Newton, who escapes the FBI by going to Cuba with the help of Hollywood producer Bert Schneider (Alessandro Nivola). The six-parter, which premieres Friday, is based on a 2013 Playboy article written by Joshuah Bearman, who also wrote the article that became the movie “Argo.”
