2. Who was it?
• Born in South Dakota, 1901
• Made vital contributions to atomic bomb
• Invented cyclotron that accelerated
particles to high velocity without high
voltage, used to make new elements
• Developed e/m ratio of electron
• Liked “Lawry’s” seasoned salt
3. Ernest Lawrence
• 1901-1958
• Invented cyclotron,
1929
– Accelerated particles to
bombard with atoms
• Made new elements
• Made anti-matter to
study
• Won Nobel prize in
physics, 1939
4. Who was it?
• Born in Copenhagen in 1885
• Researched structure of the atom
• First to postulate that electrons travel
around nucleus of atom
• Predicted splitting of uranium atoms
• Gave lectures, never “boring”
5. Niels Bohr
• 1885-1962
• Known for the Bohr
model of the atom
– Electrons travel
around nucleus in
restricted orbits
• Won Nobel prize in
physics in 1922
6. Who was it?
• Born in Württemberg, Germany, 1879
• Postulated light travels in individual
photons, 1905
• Wrote special theory of relativity 1905
• Wrote general theory of relativity 1916
• E = mc2
7. Albert Einstein
• 1879-1955
• Postulated photons
travel in discreet energy
packets (individual
photons)
• Theories of special and
general relativity
• Nobel prize in physics,
1921
8. Who was it?
• Born 1852 in Paris
• Discovered natural radiation in uranium
in 1896
• Unit of radiation named after
• 1 disintigration/second = 1 Bq
• “Oh Henry!”
9. Henri Becquerel
• 1852-1908
• Known for his
discovery of natural
radiation in uranium
• Shared Nobel Prize
with the Curies in
1903
10. Who was it?
• Born in Rome, 1901
• Contributed to early theory of beta decay and
neutrino
• Demonstrated nuclear transformation with
neutrons in elements
• Led experiment that performed first controlled
nuclear reaction
• Very “fair to me”
11. Enrico Fermi
• 1901-1954
• Discovered neutrino
and neutron
activation
• Work led to fission
and controlled
nuclear reaction
• Nobel prize physics,
1938
12. Who was it?
• Born in Nelson, New Zealand, 1871
• Discovered alpha and beta particles in
1898
• Devised method of counting alpha
particles with H Geiger
• Investigations of alpha scattering in
1910 led to the discovery of the nucleus
• Knighted in 1914
13. Sir Ernest Rutherford
• 1871-1937
• Discovered alpha
and beta particles
• Discovered nucleus
in 1910
• Won Nobel prize in
chemistry, 1908
14. Who was it?
• Born Frankfurt-on-Main, Germany, 1879
• Discovered radiothorium, radioactinum, and
mesothorium
• Developed methods of separating radioactive
particles
• Discovered fission by bombarding uranium
and thorium with neutrons, 1938 with
Strassman
• Lets all give him a “hand”
15. Otto Hahn
• 1879-1968
• Discovered the process
of fission by
bombarding uranium
with neutrons (including
the chain reaction)
• Won Nobel prize in
chemistry in 1944
16. Who was it?
• Born in Warsaw, 1867
• Discovered radium and polonium and
developed means to separate it
• Refused to patent work for money
• Developed unit of radioactivity
– 1 Ci = 37,000,000,000 disintigrations/sec
• There was no “cure” for her radiation
17. Marie Curie
• 1867-1934
• Known for her
discovering and
separating radium and
polonium
• Shared Nobel prize in
physics, 1903 and full
prize in chemistry, 1911
– (First to receive two
prizes)
18. Who was it?
• Born in 1978
• Isolated protactinium with Otto Hahn in
1917
• Worked with Hahn on behavior of beta
rays
• Helped discover fission with Hahn and
Strassman
• “Meitnerium” named after her (elm 109)
19. Lise Meitner
• 1878-1968
• Spent much of
career working with
Otto Hahn
– Helped discover
fission with Hahn
and Strassman
– Discovered elements
with Hahn
20. Who was it?
• Born in Lennep, Germany, 1845
• Worked on thermal conductivity of
crystals
• Discovered X-rays
• Unit of radiation named after him for
dose (R)
• He had the “will” to do it
