Ernest Rutherford

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…
James Chadwick and the Discovery of the Neutron

James Chadwick and the Discovery of the Neutron

James Chadwick(1891 – 1974) On February 27, 1932, English physicist and Nobel Laureate Sir James Chadwick published an article in the scienticic 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…
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…
Henry Moseley and the Atomic Numbers

Henry Moseley and the Atomic Numbers

Henry Moseley (1887-1915) 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 you will have heard about Henry Moseley and his concept of the atomic numbers. In chemistry and physics, the existence of a periodic table creates an ordering for the elements, and was first proposed by Russian chemist and inventor Dimitri…
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