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Henning Brand
merchant, pharmacist, and alchemist. He was born in Hamburg, Germany. He is recognized for discovering phosphorus. He is believed to have been born into an upper-class family. He passed the knowledge from him to Daniel Kraft about the match; then Johann von Löwenstern-Kunckel obtained some information on how to obtain phosphorus. He was a low-ranking officer in the army during the Thirty Years' War. Thanks to the dowry of his first wife, he practiced alchemy. -
John Dalton
He was a British naturalist, chemist, mathematician and meteorologist. His works include atomic models and tables of the relative weight of elements, which laid the foundations of modern chemistry. -
Matter composition
Dalton created a theory that matter is composed of atoms of different masses that combine in simple proportions to form compound, is the cornerstone of modern physical science. -
the atomic model
Dalton's model was the first scientifically based atomic model and was proposed in several steps between 1803 and 1808, although the author more appropriately called it the "atomic theory." -
Ernest Rutherford
Ernest Rutherford, 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). -
Nobel prize in chemestry
•Ernest Rutherford, found that radioactivity was accompanied by a disintegration of the elements, which earned him the Nobel Prize in Chemistry. He owes an atomic model, with which he proved the existence of the atomic nucleus, in which all the positive charge and almost the entire mass of the atom. -
The neutron
•Ernest Rutherford first proposed the existence of the neutron with an experiment involving the bombardment of a beryllium disk by alpha radiation from a polonium source. Diagram of the experiment as presented by Chadwick in his article on the discovery of the neutron -
Niels Bohr
Danish physicist. Considered one of the most dazzling figures in contemporary physics and, for his theoretical contributions and practical work, as one of the fathers of the atomic bomb, he was awarded with the Nobel Prize in Physics "for his research on the structure of atoms and the radiation that emanates from them ". -
Joseph John Thomson
British physicist. The son of a bookseller, Joseph John Thomson studied at Owens College and later at the University of Manchester and Trinity College, Cambridge. He graduated in mathematics in 1880, held the Cavendish professorship, and was subsequently appointed director of the Cavendish Laboratory at the University of Cambridge.
