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John Dalton
John Dalton was the first to propose the 'Atomic Theory" in 1803. As well as forming the Theory he also dicovered colour blindness in 1798 and was sometimes referred to as "Daltonism".
He stated that an element is one of a kind because the atoms of an element are exactly the same. -
Joseph John Thomson
Joseph John Thomson is an English physicist and discovered the electron in 1897 as well has many isopes. He proposed the Plum Pudding model in 1904 before the discovery of the atomic nucleus. He received the Nobel Prize for Physics in 1906 and was knighted two years later in 1908. -
Marie Curie
Marie Curie was the first person in history to be awarded two Nobel Prizes. One for her theory of radio activity and the other for isolating radio-active isotopes and the dicovery of two new elements, polonium and radium. In 1894 she met Pierre Curie and together researched uranium rays which led to the discovery of polouim. In 1914 Curie formed a laboratory called 'Curie Laboratoy' and became the director of it. -
Ernest Rutherford
In 1899 Ernest Rutherford dicovered alpha radiation and beta raditation. In 1902 he cleaverly descovered that in radioactivity, atoms broke down into completely deiiferent elements. In 1919, Rutherford was the 1st person to transform one element into another through a number reaction. 1921 he, with Niels Bohr gave theory of exsitance of neutrons. -
Francis Aston
Francis Aston's contribution to our knowledge of the Atomic Theory was he dicovered a large amout of isotope (atoms of the same element that are different in mass). He also formulated the 'Whole Number Rule' which was produced in 1919. In 1895 he dicovered x-rays and after radioactivity in 1896. -
Niels Bohr
In 1913 Niels Bohr published a model of atomic structure (which became the basis of the famous quantum theory). In 1916 he became professor of university Copenhagen. 1921 he founded Institute of Theoretical Physics. Later he conducted experiments under guidance of Prof. J. J. Thomson. He was named after an asteroid called 'Asteroid 3948 Bohr' and an element called 'Chemical Element Bohrium'. -
Erwin Schordinger
In 1926 Erwrin Schordinger was one of the founders of quantum mechanics. In 1927 he briefly went to Berlin, then to oxford. In 1933 he shared a Nobel Prize with Paul Dirac. 1955 he retired but wrote improtant papers until he died. -
Henry Mosely
Henry Mosley's contribution to our knowledge of the atomic theory was he established the basics of the Periodic Table of Elements by sorting the elements in order due to their atomic number. He also created his own law. Mosley's Law. Mosely's Law is a law concerning x-rays that are emitted by atoms. The law was dicovered in 1913. -
James Chadwick
In 1922 Chadwick became a research director under Rutherwood. They experimented with element alteration -
Murray Gell-Man
In 1952 Murray Gell-Mann introduced the idea of "strangeness" a quantum property and force that holds the components of the atomic nucleus. In 1961 he termed the basic particles of matter as "quarks"
