Ernest+Rutherford+-+Concept+of+the+Nucleus

= Ernest Rutherford  = http://nobelprize.org/nobel_prizes/chemistry/laureates/1908/rutherford-bio.html#not  Date of Death- October 19, 1937 Place of Origin- Nelson, New Zealand Year of Discovery- 1910 ** Born in the land down under, Ernest Rutherford grew up with his large family in New Zealand consisting of six brothers, five sisters, his father James Rutherford his grandfather His mother, née Martha Thompson, and her mother. When he was 16, Rutherford took entered Nelson Collegiate School. After only a few years, he was awarded a scholarship and enrolled into the University of New Zealand. It was there that he double majored in Mathematics and Physical Science, and with his further achievements, he earned another scholarship to enroll into Trinity College . 
 *  Date of Birth- August 30, 1871

But Ernest Rutherford wasn’t remembered by history for his numerous number of scholarships, but for his golden foil experiment. What he did was set up a particle emitter and shot small particles at a think golden foil. What he expected was for the particles to just pass through. However, by the end of his experiment, he discovered that a good quantity of particles actually either flew through the foil at an angle or just completely bounced back. With this discovery, he concluded that the particles must have been bouncing of a small defined nucleus, where the whole mass of the atom and the positive charge of the atom are concentrated. 



Dr. Reich's Week 4-Lesson 1-1 Slideshow

Rutherford's Gold Foil experiment via youtube: []\

While it used to be an unpopular idea amoung scientist, based on his discoveries, Rutherford was able to revive and prove the Planetary Atomic Model. In this model. To review, Rutherford had discovered that in an atom, a majority of the mass is focused in one spot known as the nucleus. Similar to the Plum Pudding model, Rutherford included the negatively charged electrons. But because of how little mass electrons have compared to the nucleus, they have little or no effect on the scattering of particles, like of those in the gold foil experiment. However, differing from the J.J. Thompson's Plum Pudding model, the planetary model has the light electrons circumnavigating the nucleus in a relatively orderly fashion, rather than being randomly strewn about. But unlike the planets in the solar system that are kept within the pattern because of gravity, electrons are ensnared by a powerful charge held by the nucleus.
 * Rutherford's Planetary Model-**[[image:planetarymodel.png align="left"]]

http://www.lightandmatter.com/html_books/0sn/ch08/figs/planetarymodel.png