The hisory of the atom
Storyboard Text
- Slide: 1
- James Dalton was studying compressed gasses in the 1800's.......
- These gasses must be made from induvidual particles, I will call them atoms!
- I will state that these atoms are indivisible,and are identical in mass and properties. when chemical reactions occur,It is the rearngement of the atoms. 2 or more types of atoms are compounds
- Slide: 2
- After daltons discoveries, scientists staried studing discharge tubes, which they used to further understand negative and positive charges until once sicentist, in 1897, J.J thomson made a discovery.....
- I will state that each atom has positive charges and negative electrons, the electrons are placed randomly throughout a postive matrix. This the plum-pudding model!
- These discharge tubes are producing negative charges! This means that all atoms have negatively charged particles in them, I will call these electrons!
- Slide: 3
- Ernest rutherford in 1911 was doing an expirement with gold foil and a screen, he was projecting particles at it,when something happened......
- I shall study this more.....
- I belive that the postive charges are also be made up of indivudial particles, i will call these protons. The electrons surrond the nucleus. This will be the nucluer model.
- These rays are being deflected! The can only mean that thomson was incorrect, and the positive charges are concentraed in one spot, the nucleus. In reality most of the atom is empty space!
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