-
John Dalton
John Dalton was the first person to record colour blindness.Although it is from long ago Dalton’s atomic theory still remains today. His theories were that all matter was made up of atoms and they were both indivisible and indestructible. That all atoms of an element were identical in mass and properties. Compounds were formed by a combination of two or more different atoms and a chemical reaction was a rearrangement of atoms. -
J.J. Thomson
J.J. Thomson discovered the electron and isotopes. Thomson discovered the electron as he was demonstrating that cathode rays were quickly moving particles. After measuring their speed and specific charge, he came to the conclusion that these electrons were 2000 times smaller in mass compared to the hydrogen ion, whic is the lightest known atomic particle. He also invented the mass spectrometer. -
Marie Curie
Marie Curie was a well-known chemist and physicist. She was known for her theory of radiation, techniques for isolating radioactive isotopes, and the discovery of two elements, polonium and radium. She was also the first woman to become the Professor of General Physics in the Faculty of Sciences, taking over after her husband past away. -
Ernest Rutherford
Ernest Rutherford is known as the “father of nuclear physics”. Rutherford, in a period of 3 years, created a whole new world of physics called radioactivity. In 1899 he discovered two distinctive types of radiation. They were released by thorium and uranium and he called them alpha and beta. In 1902 he came to the conclusion that radioactivity was a course of action where atoms of an element would disintegrate into a different element, and remained radioactive. -
Francis Aston
Francis Aston , within a short time of after receiving a scholarship for Birmingham University, discovered Aston Dark Space. Which is the dark region between the cathode and the cathode glow in a vacuum tube, occurring when the pressure is low. He discovered definite evidence for the existence of two isotopes of the inert gas neon. He continued to work on the separation of the isotopes of neon, and invented the mass spectrograph. Along with this he discovered 212 of the naturally occurring isoto -
Henry Moseley
Henry Moseley invented an x-ray spectra that allowed scientists to look at atoms easily. Henry’s discovery meant the original periodic table, Mendeleev’s table, was able to be more precise. Mendeleev’s table put the elements in order of atomic mass, but in many cases some of the elements wouldn’t fit into pace properly and he would breaking his rules Whereas Moseley’s table put the elements in order of atomic number, which made more sense and made the periodic table more organised. -
Niels Bohr
Niels Bohr expanded on Ernest Rutherford’s into a new theory of the structure of an atom. He discovered that electrons in an atom travel in orbits around the nucleus and they either emit or absorb energy . Bohr went on to discover that outer orbits held more electrons than inner orbits, that electrons travelling from one orbit to another emit a small amount of radiation and that the chemical properties of an atom were determined by these orbits. -
Erwin Schrodinger
Erwin Rudolf Josef Alexander Schrodinger, also know as Erwin Schrodinger, was one of the founders of quantum mechanics, known for the Schrodinger equation and had great contributions to wave theory. Erwin is mostly known for his discovery of the Schrodinger Wave Equation. This equation showed how the quantum state of a physical systems changed over time. -
James Chadwick
James Chadwick was a physicist that discovered the neutron, the elementary particle without an electrical charge, and part of an atom’s nucleus. He, and Ernest Rutherford, discovered each element had an atomic mass and atomic number, and for some elements they would be different. -
Murray Gell-Mann
Murray Gell-Man introduced the theory of “strangeness”, a quantum property and the force that holds the components of the atomic nucleus.
