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460 BCE
Democritus
Democritus was a pre-Socratic philosopher and Greek mathematician and a disciple of Leucippus. Born in Abdera, Thrace in 460 BC, his birthplace was the capital of a Greek polis now located on the north coast of Greece, near the island Thasos. His studies were done with Chaldean learned magicians -
John Dalton
John Dalton was born in the United Kingdom on September 6, 1766-Manchester, July 27, 1844) was a British naturalist, chemist, mathematician and meteorologist. His works include the atomic model and his table of relative weights of the elements, which contributed to laying the foundations of modern chemistry. He is also known for having described color blindness, a visual defect related to the perception of colors that he suffered and that bears his name. -
John Dalton
John Dalton discovered that matter is made up of atoms of different masses that combine in simple proportions to form compounds. -
Democritus
Democritus assumed the existence of the atom as an indivisible part of matter, and also ruled that there were different types of atoms. -
William Crookes
William Crookes was born in London, he was the eldest of seventeen children of a London tailor. He studied in his youth at the Royal College of Chemistry. His first job was as Hofmann's assistant. In 1854 he entered the Oxford Observatory as an assistant, and a year later he won the chair of chemistry at the University of Chester. After teaching, a substantial inheritance received allowed him to open his own research laboratory in London and edit the influential Chemical News between 1859- 1906. -
Joseph John Thomson
Joseph John Thomson was born on December 18, 1856 in Cheetham Hill, a district of Manchester in England, and was of Scottish descent. In 1870 he studied engineering at Owens College, today part of the University of Manchester, and moved to Trinity College, Cambridge in 1876. In 1880, he obtained his Bachelor of Mathematics (Second Wrangler and second Smith Prize) and Master of Arts (obtaining the Adams Prize) in 1883. -
William Crookes
In 1861 William Crookes discovered the element Thallium.
In 1875 William Crookes built the radiometer.
In 1879 William Crookes Affirmed the existence of a new state of matter, which he called radiant matter.
In 1895 William Crookes invented the Crookes tube, he also discovered the presence of electrons in atoms. -
Robert Millikan
Robert A. Millikan graduated from Oberlin College in 1891 and obtained his Ph.D. from Columbia University in 1895. In 1896 he obtained an assistant position at the University of Chicago, where he would become a professor in 1910, a position he held until 1921. In 1907 he began a series of works destined to measure the charge of the electron, studying the effect of the electric and gravitational fields on a drop of water (1909). -
Ernest Rutherford
Ernest Rutherford (August 30, 1871-Cambridge, October 19, 1937), was a British physicist born in New Zealand. He dedicated himself to the study of radioactive particles and managed to classify them into alpha (α), beta (β) and gamma (γ). He found that radioactivity was accompanied by a disintegration of the elements, which earned him the Nobel Prize in Chemistry in 1908. -
Niels Bohr
Niels Bohr studied physics at the University of Copenhagen, where he obtained his doctorate in 1911. After having revealed himself as a firm promise in the field of nuclear physics, he went to England to expand his knowledge at the prestigious Cavendish Laboratory in the University of Cambridge, under the tutelage of Sir Joseph John Thomson (1856-1940), British chemist distinguished with the Nobel Prize in 1906 for his studies on the passage of electricity through the interior of gases. -
Henry Gwyn Jeffreys Moseley
Moseley was born in Weymouth, on the south coast of England in 1887. His father was a naturalist, professor of Anatomy at Oxford, and a member of the Challenger Expedition. After studying at Eton, in 1906 he entered Trinity College, Oxford University, and after graduating from the institution in 1910, he went to the University of Manchester to work with Ernest Rutherford. During this first year in Manchester, he had a full teaching load. -
Erwin Schrodinger
Erwin Rudolf Josef Alexander Erdberg, Vienna, Austro-Hungarian Empire, August 12, 1887-ib., January 4, 1961) was an Austrian physicist, naturalized Irish, who made important contributions in the fields of quantum mechanics and thermodynamics. He received the Nobel Prize in Physics in 1933 for having developed the Schrödinger equation, shared with Paul Dirac. After maintaining a long correspondence with Albert Einstein. -
James Chadwick
James Chadwick (October 20, 1891 - July 24, 1974) was an English physicist who was awarded the 1935 Nobel Prize in physics.
James Chadwick studied at the University of Cambridge and the University of Manchester. In 1913 Chadwick began work at the Physikalisch Technische Reichsanstalt in Charlottenburg a monkey] (Germany) under Professor Hans Geiger. During the First World War he was interned in the concentration camp (Zivilgefangenenlager) in Ruhleben, near Berlin, accused of espionage. -
Joseph John Thomson
Joseph John Thomson discovered the electron.
discoverer isotopes and inventor of the spectrometer of mass. -
Ernest Rutherford
He found that radioactivity was accompanied by a disintegration of the elements, which earned him the Nobel Prize in Chemistry in 1908. -
Henry Gwyn Jeffreys Moseley
Demonstrated the relationship between the atomic number and the nuclear charge of the elements, named in his honor Moseley's Law. -
Niels Bohr
Published his own atomic model in 1913, introducing the theory of quantized orbits. -
Robert Millikan
In 1923 he was awarded the Nobel Prize in Physics, "For his work on the elemental charge of electricity and on the photoelectric effect." -
Erwin Schrodinger
He discovered the fundamental equation, and created wave mechanics or quantum mechanics. -
James Chadwick
His main contributions were in the field of nuclear physics since he discovered an atomic particle without charge in the nucleus of the atom, known today as a neutron. In 1935 he received the Nobel Prize in Physics. Chadwick also discovered tritium.
