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100
He split uranium His work led to slowing down neutrons
Enrico Fermi
100
A reaction in a nucleus causes a split into two lighter nuclei
Nuclear fission
100
Whose discoveries led to the atomic bomb
Lise Meitner
100
Father of nuclear chemistry
Otto Hahn
100
a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy
fusion
200
Coined the term "fission"
Lise Meitner
200
Who discovered the neutron? Meaning of neutron?
James Chadwick Neutral, or no charge
200
What was the Purpose of the Manhattan Project
The purpose of the Manhattan Project was to develop an Atomic Bomb
200
Who worked on electron configuration?
Niels Bohr
200
What is proton?
A particle in the neutron with a positive charge A basic building block of the nuclei of all atoms
300
Who conducted the Gold Foil experiment and what did he identify with it?
Ernest Rutherford He identified the nucleus with the gold foil experiment
300
Who worked with disintegrating atoms by bombarding nitrogen with alpha particles?
James Chadwick and Ernest Rutherford
300
When did the Manhattan Project start?
The Manhattan Project started on May 12, 1942 when President Roosevelt signed an order creating a top secret project to develop the nuclear weapon
300
The experiment of all three (Hahn, Strassman, Meitner)
Nuclear fission
300
Two types of Atomic bomb in the Manhattan Project
"Little boy" and "Fat man"
400
Discovered nuclear fission
Hahn/Strassman
400
Directors of the Manhattan Project
Robert Oppenheimer and General Leslie R. Groves
400
The key raw material for the project which was used as fuel for the reactors
Uranium
400
Purpose of the neutron
It helps to keep atoms stable
400
Process of discovery of the neutron
1. Electrons have no mass 2. Something else apart from protons was adding the mass 3. Projected alpha particles at Beryllium and saw that there was no charge
500
The physicist that headed the first controlled nuclear chain reaction in Dec. 2, 1942
Enrico Fermi
500
It shoots a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected there was a tiny, dense nucleus was causing the deflections
Gold foil experiment
500
The first nuclear reactor
The Chicago Pile-1
500
4 reasons why neutrons were important
1. play a huge role in nuclear power 2. led to the first man made nucleus 3. led to the first man made nuclear weapons 4. Nobel Peace prize in Physics for Chadwick's discovery of the neutron
500
How proton was discovered
In the gold foil experiment, Rutherford discovered the atom had a concentrated positive charge that has most of the atom's mass. He suggested that the nucleus contained a particle with a positive charge which is the proton.