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> BCE Ancient Greece
Democritus was born 460 BC, in Abdera, Greece. He claims the atom to be the simplest unit of matter. Aristotle was born 384 BC in Stagira, Greece. He declares the existence of only four elements: fire, air, water and earth. -
Period: to
Nuclear Science: People, Firsts, Discoveries, Other
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John Dalton
Born September 6, 1766, in Eaglesfield, Cumbria, United Kingdom. -
Dmitri Mendeleev
Born February 8, 1834, in Tobolsk, Russia -
JJ Thompson
Born December 18, 1856, in Manchester, United Kingdom -
Ernest Rutherford
Born August 30, 1871, in Brightwater, New Zealand -
Neils Bohr
Born October 7, 1885, in Copenhagen, Denmark. -
Radiation
First produced by Heinrich Hertz, using electrical circuits calculated to produce oscillations in the radio frequency range. -
James Chadwick
Born JOctober 20, 1891, in Bollington, United Kingdom -
X-rays
X-rays, a form of radiation were discovered by Wilhelm Conrad Rontgens -
Radioactivity is Termed
Henri Becquerel used naturally fluorescent minerals to study the properties of x-rays, he discovered radioactivity. -
Electron
J.J. Thomson discovered the electron a negatively charged particle. -
Alpha Particle
An alpha particle has a helium nucleus -
Gamma Rays
Gamma Rays are forms of radiation in shorter wave lengths -
Paul Dirac
Born August 8, 1902, in Bristol, United Kingdom -
First Chemotherapy
Paul Ehrlich developed drugs to treat infectious diseases. He coined the term and defined it as the use of chemicals to treat disease. -
Proton
Rutherford discovered the proton a positively charged particle. -
Particle Accelerator
Uses electormagnetic fields to propel charged particles to high speeds and to contain them in well- defined beams. -
Antielectron
An Antielectron is a positively charged electron -
Fusion
Fusion is two hydrogens fusing to become a helium -
Neutron
A neutron is a particle that carries no charge -
Nuclear Reactor
Was brought about by nuclear reactions mediated by neutrons, by Hungarian scientist Leó Szilárd -
Muon
A muon is an unstable subatomic particle -
Fission
Fission is splitting of something into parts -
Manhattan Project
The Manhattan Project was a research and development project that produced the first atomic bombs during World War II. Active till 1946. -
First Chain Reaction
Enrico Fermi created the first controlled chain reaction. -
Little Boy
The codename for the type of atomic bomb dropped on Hiroshima on August 6, 1945. -
Fat Man
The codename for the type of atomic bomb that was detonated over Nagasaki, Japan. -
Kaon
A kaon is a meson having a mass several times of a pion. -
Pion
A pion is a meson having a mass 270 times that of an electron -
Quarks
Quarks a number of subatomic particles -
First MRI
The first time a human scan (MRI) was used, administered by Sir Peter Mansfield’s team of doctors. -
Nuclear Non-Proliferation Act of 1978
A declaration that nuclear explosive devices posed a perilous threat to the security interests of the USA and continued international progress towards world peace and the development of nations. -
Gluons
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Three Mile Island
A partial nuclear meltdown which occurred at Three Mile Island in Dauphin County, Pennsylvania, USA. -
Chernobyl
A catastrophic nuclear accident that occurred at the Chernobyl Nuclear Power Plant. -
Fukushima
A catastrophic failure at the Fukushima Nuclear Power Plant, Japan. -
Higgs Boson
Higgs Boson is a particle that gives mass to certain elementary particles. -
First Elementary Particle
The first subatomic particle to be discovered was the electron, identified in 1897 by J. J. Thomson. Other particles include proton (1911), neurton (1932).