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JJ Thomson
Electricity must be made up of negatively charged particles. What soon were called electrons. Electron must be a tiny piece of every atom. -
Period: to
The Mystery of Matter
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Ernest Rutherford
Radioactive atoms give off different kinds of rays and particles as they decay. Used Alpha particles ( positively charged) to calculate the distance of closest approach. -
Charles D. Darwin
Concluded atoms inside the crystal were neatly aware and rose that reflected the x-rays to create the patterns of spots. -
James Chadwick
He discovered the final piece of the atom- the neutron. -
Enrico fermi
Begin firring neutron at uranium atoms creating a shower of fragments he will then analyze. He found that neutrons sometimes ship off a piece of the uranium nucleus lowering atomic number making it another element. -
Fermi
He won the nobel price for an amazing achievement. -
Germans
Otto Hahn, Otto Frisch, Fritz Strassman, Lise Meitner; they found well known elements that were about half as heavy, much lower on the periodic table. -
Ed Nick Nilen
He studied the new phenomenon; repeated the Germans experiments at barbering uranium atoms with neutrons from the cyclotron. -
McMillein
He discovered the element number 93- Neptunium. -
Arthur Compton & Harvard president James Bryan conent
They discussed c-board founding; creating a bomb. -
Feremy and his team
Build a nuclear reactor out of wood, graphite, and uranium; Chicago pile 1; uranium 238 into plutonium 239. -
Plutonium
plutonium will be made by remote control. -
Alamagordo
First test of atomic bomb using plutonium.