Ernest Rutherford LB

Ernest Rutherford LB

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  • Good Afternoon! My name is Ernest Rutherford, and I was the first to discover something magnificent about the atom!
  • I also discovered that electrons have a negative charge that rotate around the nucleus.
  • I discovered that atoms contain a small charged positive nucleus enclosed by an enormous amount of empty space.
  • So how did I discover all of this? Well, in 1908 I invented an experiment using light particles and a sheet of gold foil to try and figure out the atoms structure. I finished my experiment in 1913 after lots of hard work, and am proud to have accomplished it!
  • The grey cube is a lead box and the green sphere inside, is the source [radium]. The purple line is filled with light particles, and the yellow square is the gold foil. There is also a detecting screen around the outside that shows where the particles landed.
  • The light particles were shot through the foil and almost all of them went through or turned at an angle, but 1 out of 8,000 particles deflected off the detecting screen.
  • In my conclusion I stated that the atom must be mostly made up of empty space and a compact area of positive charge in the middle. I knew it was positive because it deflected the positively charged particles
  • In between the nucleus and electrons there is a large amount of empty space
  • This is my model of the atom. The nucleus is positive and is located in the middle. The negative electrons rotate around the nucleus. .
  • There you have it. That was my atomic theory of the atom!
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