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5 giorni fa · Indice. Supera il Test di ingresso. Preparati alle prove di ammissione con i libri e corsi UnidTest. Scopri di più. Prima di arrivare al modello atomico di Bohr. I primi tentativi di definire la struttura atomica si devono agli scienziati Joseph John Thomson (1904) e Ernest Rutherford (1911).
7 mag 2024 · Joseph John Thomson proposed this model in 1904 and pictured atoms that are a bit like a classic British dessert. In this model, the atom is imagined as a “pudding” of positive charge with negative electrons scattered throughout, like plums in a pudding.
14 mag 2024 · J·J·湯姆森. 约瑟夫·约翰·汤姆孙 爵士 [註 1] OM FRS （ Sir Joseph John "J. J." Thomson ，1856年12月18日—1940年8月30日） [1] ，英国 物理学家 ， 诺贝尔物理学奖获得主 ， 他发现了电子并測定了其質荷比，这是第一个被发现的 亚原子粒子 。 1897年，汤姆孙表明， 阴极射线 由以前未知的带负电粒子（现称为 电子 ）组成，他计算出這種粒子必须比原子小得多，並且有非常小的 质荷比 [2] 。 汤姆孙在1913年也发现了稳定（非放射性）元素 同位素 的第一个证据，这是他在探索陽極射線（正离子）的過程中的成果之一。 他与 弗朗西斯·阿斯頓 一起确定带正电粒子的性质的实验是 质谱法 的第一次使用，使得质谱仪的發展 [2] 。
17 mag 2024 · Consequently, Joseph John Thomson (1889) found a way to substantially simplify calculations concerning moving charges by using the following mathematical transformation (like other authors such as Lorentz or Larmor, also Thomson implicitly used the Galilean transformation z-vt in his equation):
2 giorni fa · JOSEPH JOHN THOMSON. Fisico inglese, premio Nobel, scopritore dell'elettrone. α 18 dicembre 1856 ω 30 agosto 1940. Particelle negative e scoperte ...
1 giorno fa · J.J. Thomson, born Joseph John Thomson, was a prominent physicist who made significant contributions to our understanding of the atomic structure and the nature of electrons. His groundbreaking experiments and discoveries paved the way for modern physics and earned him the prestigious Nobel Prize in Physics in 1906.
4 giorni fa · Joseph John Thomson "On the ground of his discoveries in physical science" 1915: Ivan Pavlov "On the ground of his investigations in the physiology of digestion and of the higher centres of the nervous system" 1916: James Dewar "For his important investigations in physical chemistry, more especially his researches on the liquefaction of gases"
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