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460
Democritus
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John Dalton
Daltons work had been taught throughout the world. His findings have made him very well known in the subject of atoms. He found that there is a point where matter could not be broken down into anything smaller. Atom – tiny particles. His work had been taught throughout the world and although It took a while for people to start to agree with his theory it helped us understand atoms today. -
Joseph Thompson
• His work had been taught throughout the world.• His findings have obviously made him very well known.• It took a while for people to start to agree with his theory.• Found that there is a point where matter could not be broken down into anything smaller.• Atom – tiny particles.• .This shows that the atom has been split. -
Ernest Rutherford
ο He was very successful growing up and he made a lot of effort to get to where he was.ο He was awarded many awards.ο In the early 1900's most scientists had the theory that there was a positive charge within the atom. ο Instead of an atom being a tightly packed snowball Rutherford showed that an atom had a solid marble like centre and the rest was empty.ο He discovered with other scientists that what they originally thought the atom appeared was not as they thought. -
Hans Geiger
• Born 1882-1945 in Germany.• Geiger worked in the Manhattan project to create an atomic bomb.• Geiger and Rutherford discovered that the two alpha particles emitted radio decay of uranium.• In 1910 he invented the Geiger Counter that was able to detect the levels of radioactive uranium.• Even in a household you are able to find the radioactive levels that are being detected by the Geiger Counter -
Neils Bohr
• David Bohr was born in 1885 – 1962 and he was one of the most influential scientist in the 20th century.• Ernest Rutherford which was his mentor had already shown that atoms where made up of a nucleus with electrons.• Bohr working alongside Rutherford added to his theory, that electrons may only travel in a larger sphere.• The Bohr model gives an explanation of the movements of neutrons, protons and electrons being like a solar system.• Bohr’s theory was originally becoming a basis for the -
James Chadwick
• David Bohr was born in 1885 – 1962 and he was one of the most influential scientist in the 20th century.• Ernest Rutherford which was his mentor had already shown that atoms where made up of a nucleus with electrons.• Bohr working alongside Rutherford added to his theory, that electrons may only travel in a larger sphere.• The Bohr model gives an explanation of the movements of neutrons, protons and electrons being like a solar system.• Bohr’s theory was originally becoming a basis for the -
Enrico Fermi
• Born in Rome in 1901-1954.• The scientific community had identified protons neutrons and electrons but Fermi had discovered that splitting the atom and then creating a chain reaction.• He was noted for discovering the nuclear chain reaction.• A nuclear chain reaction would generate more energy lead to more nuclear plants and an atom bomb. -
Paul Dirac
• His work has been widely criticised in all aspects of the mechanics.• He was born in 1902 to 1984 on the 20th of October -
Glenn Seaborg
• Glenn Theodore Seaborg was born in 1912 – 1999.• He grew up in Ishpeming in Michigan until he was 10 and then moved to California.• • He discovered that an atom could be split with an atom an that this could possibly be used as a useful power source or as a destructive force.• The atom had explosive potential and could be split in two.
