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Democritus was an Ancient Greek pre-Socratic philosopher from Abdera. Democritus hypothesized that atoms could not be destroyed, differ in size, shape, and temperature, are always moving, and are invisible. -
Plato was an ancient Greek philosopher born in Athens during the Classical period. In Athens, Plato founded the Academy, a philosophical school where he taught the philosophical doctrines that would later become known as Platonism. Plato proposed that matter was continuous, infinite, present in every form, and always all around us. Theorize that these solid forms of matter are composed of indivisible elements shaped like triangles. -
The Alchemist believed that all metals were formed from two principles: mercury and sulfur. They also claim to transmute metals and offer great possibilities to any rogue. -
Robert Boyle FRS was an Anglo-Irish natural philosopher, chemist, physicist, alchemist, inventor, and was considered one of the pioneers of modern experimental scientific methods. Robert Boyle created Boyle's Law which states that the volume of a given mass of gas varies inversely with pressure when the temperature is constant. -
Antoine-Laurent de Lavoisier, also Antoine Lavoisier after the French Revolution, was a French nobleman and chemist who was central to the 18th-century chemical revolution and who had a large influence on both the history of chemistry and the history of biology. He expressed the law of conservation of mass. This law states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. -
John Dalton FRS was an English chemist, physicist, and meteorologist. He proposed an atomic theory regarding spherical atoms with measurable properties of mass. -
Billiard Ball Model also known as Dalton's Model of an Atom. Dalton defined an atom to be a ball-like structure. -
Lorenzo Romano Amedeo Carlo Avogadro, Count of Quaregna and Cerreto, was an Italian scientist. He stated that equal volumes of gases at the same temperature and pressure contain the same number of molecules regardless of their chemical nature and physical properties. -
Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He created Mendeleev's law which allowed him to build up a systematic table of all the 70 elements then known. Stated that elements arranged according to the value of their atomic weights present a clear periodicity of properties. -
Marie Curie and her husband, Pierre came together through a shared love of science and research. They discovered radium and polonium. And won the Nobel prize for physics. -
Proposed by JJ Thomson. He described as electrons scattered within a positive area, like that of plum pudding. -
Sir Joseph John Thomson OM FRS was a British physicist and Nobel Laureate in Physics, credited with the discovery of the electron, the first subatomic particle to be found. He used a CRT to uncover the charge-to-mass ratio of an electron. Created the Plum pudding model -
Albert Einstein was a German-born theoretical physicist who is widely held to be one of the greatest and most influential scientists of all time. He created the atomic theory that stated that any liquid is made up of molecules (invisible in 1905). Furthermore, these molecules are always in random, ceaseless motion. Prove the existence of atoms mathematically. -
Robert Andrews Millikan was an American experimental physicist who won the Nobel Prize for Physics in 1923 for the measurement of the elementary electric charge and for his work on the photoelectric effect. He conducted the oil drop experiment which uncovered the charge and mass of an electron -
Ernest Rutherford, 1st Baron Rutherford of Nelson, OM, PRS, HonFRSE was a New Zealand physicist who was a pioneering researcher in both atomic and nuclear physics. Rutherford has been described as "the father of nuclear physics", and "the greatest experimentalist since Michael Faraday". He performed the gold foil experiment, establishing the nucleus of an atom being dense, small, and positively charged with electrons outside of it. Disproved the plum pudding model. -
Created by Bohr. He described atoms as consisting of electrons in orbit around the nucleus. -
Henry Gwyn Jeffreys Moseley was an English physicist. He determined the charges on most atoms of the nuclei using X-ray tubes. Responsible for the periodic table being rearranged by atomic number rather than atomic mass. -
Niels Henrik David Bohr was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922. He came up with an explanation of atomic structure that explained the regularities of the periodic table. -
Werner Karl Heisenberg was a German theoretical physicist and one of the main pioneers of the theory of quantum mechanics. He proposed the Principle of Indeterminacy and attached the idea of atoms to an equation regarding frequencies of spectral lines. Formulated a type of quantum mechanics based on matrics. -
Created by Erwin Schrodinger. He shows that scientists could only make educated guesses as to the position of electrons, so it is described as a "cloud". -
Erwin Rudolf Josef Alexander Schrödinger, sometimes written as Schroedinger or Schrodinger, was a Nobel Prize–winning Austrian and naturalized Irish physicist who developed fundamental results in quantum theory. He described electrons as continuous clouds and introduced wave mechanics as a factor of the atom. Created the Electron cloud model. -
Sir James Chadwick, CH, FRS was an English physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932. He used alpha particles to discover the existence of neutrons.
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