Ernest Rutherford

Henry Moseley and the Atomic Numbers

Henry Moseley and the Atomic Numbers

On August 10, 1915, English physicist, Henry Moseley was killed in action. Moseley‘s contribution to the science of physics was the justification from physical laws of the previous empirical and chemical concept of the atomic number. This stemmed from his development of Moseley’s law in X-ray spectra. For sure you do remember that poster from your classroom with all the chemical elements ordered in the so-called periodic table. But, certainly only a few of…
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James Chadwick and the Discovery of the Neutron

James Chadwick and the Discovery of the Neutron

On February 27, 1932, English physicist and Nobel Laureate Sir James Chadwick published an article in the scientific journal ‘Nature‘ about the discovery of the neutron, a previously unknown particle in the atomic nucleus. James Chadwick was born and raised in Bollington, England and later studied at Manchester and Cambridge University. Just before the start of World War I, Chadwick moved to Berlin, studying at the city’s Technical University under Ernest Rutherford and Hans…
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Paul Villard and the Gamma Radiation

Paul Villard and the Gamma Radiation

On September 28, 1860, French chemist and physicist Paul Ulrich Villard was born. Villard is best known for having discovered gamma rays in 1900 while studying the radiation emanating from radium. Youth and Education Paul Villard was born in Saint-Germain-au-Mont-d’Or, Rhône, France. Villard entered the École Normal Supérieure in 1881 and received the agrégé in 1884, which gave him the license to teach at any secondary school financed by the government.[2] After…
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Hans Geiger and the Geiger Counter

Hans Geiger and the Geiger Counter

Hans Geiger(1882 – 1945)Image: Wikimedia User GFHund On September 30, 1882, German physicist Johannes Wilhelm Geiger was born. He is best known as the co-inventor of the Geiger counter and for the Geiger–Marsden experiment which discovered the atomic nucleus. Hans Geiger started his physical and mathematical studies at the University of Erlangen, where he finished his final examinations and his doctorate on measurement of radiation. He moved to Manchester, where he became…
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Ernest Rutherford Discovers the Nucleus

Ernest Rutherford Discovers the Nucleus

Ernest Rutherford(1871 – 1937) On December 20, 1910, New Zealand born physicist Ernest Rutherford made his seminal gold foil experiment which led to first insight about the nature of the inner structure of the atom and to the postulation of Rutherford’s concept of the “nucleus”, his greatest contribution to physics. Most interestingly, Rutherford made his greatest discovery after receiving the Nobel Prize in chemistry in 1908. Ernest Rutherford was born on August…
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