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460 BCE
Democritus
Democritus is best known for the atomic or atomistic theory he co-developed with his teacher, Leucippus. Although a contemporary of Socrates, Democritus is considered among the last of the pre-Socratics. It is generally believed that Leucippus contributed more to atomism's founding than Democritus, but that Democritus was more responsible for the theory's refinement. -
John Dalton
British chemist John Dalton was born in Eaglesfield, England, on September 6, 1766, to a Quaker family. He had two surviving siblings. Both he and his brother were born color-blind. Dalton's father earned a modest income as a handloom weaver. As a child, Dalton longed for a formal education, but his family was very poor. It was clear that he would need to help out with the family finances from a young age.https://youtu.be/JqCGUWue4eE -
J.J Thomson
J.J Thomson was an English scientist. He discovered the electron when he was experimenting with gas discharge tubes. He noticed a movement in a tube. He called the movement cathode rays. The rays moved from the negative end of the tube to the positive end. He realized that the rays were made of negatively charged particles- Electrons. -
Lord Ernest Rutherford
Chemist and physicist Ernest Rutherford was born August 30, 1871, in Spring Grove, New Zealand. A pioneer of nuclear physics and the first to split the atom, Rutherford was awarded the 1908 Nobel Prize in Chemistry for his theory of atomic structure. Dubbed the “Father of the Nuclear Age,” Rutherford died in Cambridge, England, on October 19, 1937 of a strangulated hernia. -
Niels Bohr
Born on October 7, 1885, in Copenhagen, Denmark, Niels Bohr went on to become an accomplished physicist who came up with a revolutionary theory on atomic structures and radiation emission. He won the 1922 Nobel Prize in physics for his ideas and years later, after working on the Manhattan Project in the United States, called for responsible and peaceful applications of atomic energy across the world.
