Dalton Levy

Democritus - Formulated an atomic theories for cosmos. during the 19th century and helped understand the atomic structure.

Lavoisier- He stated the first version of the law of conservation of mass and he also recognized and named oxygen and many more. He also helped construct the metric system.

John Dalton- He is best known for his pioneering work in the development of modern atomic theory, and his research into color blindness. his beliefs are sometimes referred to as Daltonism, in his honor.

J.J. Thomson- He is credited for the discovery of the electron and of isotopes, and the invention of the mass spectrometer. Thomson was awarded the 1906 Nobel Prize in Physics for the discovery of the electron and for his work on the conduction of electricity in gases.

Ernest Rutherford-In early work he discovered the concept of radioactive half life, proved that radioactivity involved the transmutation of one chemical element to another, and also differentiated and named alpha and beta radiation.

Marie Curie-creation of a theory of radioactivity, techniques for isolating radioactive isotopes, and the discovery of two new elements, polonium and radium. Under her direction, the world's first studies were conducted into the treatment of neoplasms using radioactive isotopes

Enrico Fermi- work on the development of the first nuclear reactor and for his contributions to the development of quantum theory, nuclear and particle physics, and statistical mechanics.