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Hace 1 día · By 1914, experiments by physicists Ernest Rutherford, Henry Moseley, James Franck and Gustav Hertz had largely established the structure of an atom as a dense nucleus of positive charge surrounded by lower-mass electrons.
Hace 5 días · Antoine Lavoisier (born August 26, 1743, Paris, France—died May 8, 1794, Paris) was a prominent French chemist and leading figure in the 18th-century chemical revolution who developed an experimentally based theory of the chemical reactivity of oxygen and coauthored the modern system for naming chemical substances.
- Arthur L. Donovan
Hace 3 días · Tabla periódica actual En 1912 Henry Moseley, ordeno los elementos de la tabla periódica usando como criterio de clasificación el número atómico (Z), ya que el valor es el mismo para todos los átomos de un mismo elemento tenga o no isotopos.
Hace 3 días · Henry Goddard, uno de estos “peculiares investigadores”, al observar una bala extraída del cuerpo de una víctima de un asesinato, se percató de la existencia de una llamativa protuberancia o abultamiento en la misma.
Hace 16 horas · Victory Medal. Sir Oswald Ernald Mosley, 6th Baronet (16 November 1896 – 3 December 1980) was a British aristocrat and politician who rose to fame during the 1920s and 1930s when, having become disillusioned with mainstream politics, he turned to fascism. He was a member of parliament and later founded and led the British Union of Fascists (BUF).
Hace 3 días · In 1913, Henry Moseley showed that the atomic number is a most fundamental property. After this discovery, the classification of the elements in the periodic table was based on the atomic number of the elements. The elements were arranged in the increasing order of atomic numbers.
Hace 3 días · He made a fundamental contribution to chemistry by announcing in 1869 the principle of periodicity of properties in the chemical element s. His periodic table was based on this principle, arranging the elements in ascending order of atomic weight and grouping them by similarity of properties.
