Chemistry
Published on Nov 18, 2015
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PRESENTATION OUTLINE
DEMOCRITUS THEORY
- To know about the atom
- Greek word of indivisible
- The smallest thing
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EARTH/WIND/FIRE/WATER THEORY
- Only four elements
- All matter was made of those things
- Think that they held together or pulled apart
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BILLIARD BALL THEORY
- Cant split atoms
- Compounds elements
- Dont get destroyed but get removed
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JJ THOMSON 1904
PLUM PUDDING MODEL
PLUM PUDDING THEORY
- Electron was discovered
- Called electrons corpusle
- It is also known as chocolate chip
RUTHERFORD 1911
NUCLEUS
NUCLEUS THEORY
- Positive and negitive in atom
- + And - are small
- Came up with the word atomic mass
MILLIKAN 1913
CHARGE OF AN ELECTON
CHARGE OF ELECTRON THEORY
- Proton inside electron outside
- Mass of electron is 1000 times smaller then the lightest atom
- Electrons play a huge roll in electricity
CHADWICK 1935
PROTON AND NEUTRON
CHADWICKS THEORY
- He discovered the neutron in the atom
- Worked on radio activity
- Atomic number was the same as protons
