Friedman, Jerome Isaac (1930-...), an American physicist, did important research into some of the basic particles that form atoms. His investigations into electrons, protons, and neutrons helped to develop the concept of quarks, tiny particles that make up protons and neutrons (see Quark). For his work, Friedman shared the 1990 Nobel Prize for physics with fellow American Henry Kendall and Canadian-born physicist Richard Taylor (see Kendall, Henry Way and Taylor, Richard Edward).