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John Dalton
After describing experiments to ascertain the pressure of steam at various points between 0 and 100 °C (32 and 212 °F), Dalton concluded from observations on the vapour pressure of six different liquids, that the variation of vapour pressure for all liquids is equivalent, for the same variation of temperature, reckoning from vapour of any given pressure.
In the fourth essay he remarks,
"I see no sufficient reason why we may not conclude that all elastic fluids under the same pressure expand" -
JJ Thomson
Discovered the electron -
Max Planc
His fame rests primarily on his role as originator of the quantum theory. This theory revolutionized human understanding of atomic and subatomic processes. -
Ernest Rutherford
Known as the father of nuclear physics. -
Niels Bohr
Bohr's activities in his Institute were focused on research on the constitution of the atomic nuclei and of their transmutations and disintegrations. He also contributed to the clarification of the problems encountered in quantum physics, which is discussed in several essays written between 1933 and 1962. -
Werner Heisenberg
He made important contributions to the theories of the hydrodynamics of turbulent flows, the atomic nucleus, ferromagnetism, cosmic rays, and subatomic particles, and he was instrumental in planning the first West German nuclear reactor at Karlsruhe. -
James Chadwick
Discovered the neutron -
Democtrius
His theory: Matter could not be divided into smaller and smaller pieces forever, eventually the smallest possible piece would be obtained. This piece would be indivisible. He named the smallest piece of matter “atomos,” meaning “not to be cut.”