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Dalton's Model
Dalton's model is one of the fundamentals of chemistry and physics. It explained that atoms were indestructible, tiny particles. Also, that each had a certain chemical behaviour, mass and size used to determine what kind of element they where. Dalton also called this model the "Billard Ball Model" because he believed atoms looked like billiard balls. -
John Dalton
John Dalton was born on September 6, in 1766. He was a meteorologist, chemist, and physicist. His atomic theory, in 1803, was that atoms of different elements could be separated and distinguished by the difference in their weights. -
William Crookes
William Crookes was born on June 17, 1832, in London, England. He was a british physicist and chemist. His advances in science caused a great impact and contributed to the atomic theory. He discovered and developed a vacuum pump which allowed him to produce cathode-ray tubes with smaller residual gas pressure. -
Crooke's Tube
William Crooke discovered the electron by reconstructing the Cathode Ray. Crooke reconstructed it by putting silver on one side and black vanes on the other, causing the vacuum tube to spin when it hit light. He needed a new and original name, due to the fact that the Cathode Ray already existed. He called it Crooke's Tube. -
Joseph John Thomson
Joseph John Thomson was born on December 18, 1856, in Cheetham hill. Since he was young, he had a incline towards the field of science. In 1897 he discovered the electron and came up with a new theory, which consisted of atoms being made up of small particles. In order to prove his theory, he used a cathode ray tube. -
Plum Pudding
The Plum Pudding Model is an atom model created by the scientist JJ Thomson. It is also referred to as the Blueberry Muffin Model or Chocolate Chip Cookie. It got it's name because you can imagine a plum pudding (being positively charged) with the plums being negatively charged electrons. -
Ernest Rutherford
Ernest Rutherford was born on August 30, 1871 in Nelson, New Zealand. He was very famous for his gold-foil experiment. He first shot a beam of alpha particles at a sheet of gold foil and some of the particles were deflected. Because of this, he concluded that a dense nucleus was the cause of the deflections. -
Rutherford Model
The Rutherford model was the first modern concept of atomic structure. It proved that JJ Thomson's theory of the atom was incorrect. The Rutherford model consisted of a positively charged nucleus, with electrons orbiting around the nucleus. -
Niels Bohr
Niels Bohr was born on October 7, 1885 in Copenhagen, Denmark. He came across Max Planck's early quantum theory while he was researching for his doctoral thesis on the electron theory of metals. After that, Niels met Ernest Rutherford, which led him to combine Planck's theory about quanta and Rutherford's description of the nucleus. By combining the theory and description, Bohr was able to develop a picture of atomic structure and was able to explain what happens inside an atom. -
Bohr Model
The Bohr model was introduced by Niels Bohr in 1913. It is a model that consists of negatively charged orbiting electrons surrounding a small, positively charged nucleus. -
Quantum Mechanical Model
The Quantum Mechanics model is based on mathematics and the quantum theory. It uses electron clouds (complex shapes of orbitals). -
James Chadwick
James Chadwick, a widely known scientist was born October 20, 1891 in Chesire, England. Thanks to his remarcable discoveries, the atomic theory has progressed a lot throughout the years. First. he discovered the neutron, and then in 1932, he predicted that an atom would had a neutron. Fortunately, his theory was proven correctly. After his discovery, he established that the atomic number of an element can be determined by the number of protons in an atom. -
Bibliography Part 3
Answers.com. Answers, n.d. Web. 04 Sept. 2013. "Development of the Atom." ThinkQuest. Oracle Foundation, n.d. Web. 05 Sept. 2013. "Sir William Crookes' - The Atomic Structure 1861-1880." Sir William Crookes' - The Atomic Structure 1861-1880. N.p., n.d. Web. 05 Sept. 2013. -
Bibliography Part 1
"James Chadwick - Biographical." James Chadwick - Biographical. N.p., n.d. Web. 31 Aug. 2013. "Niels Bohr (Danish Physicist)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 30 Aug. 2013. "Niels Bohr." Wikipedia. Wikimedia Foundation, 09 Mar. 2013. Web. 03 Sept. 2013. "Niels Bohr Atomic Theory." Chemistry Help Online, Learn Chemistry, Chemistry Tutor. N.p., n.d. Web. 04 Sept. 2013. "J.j. Thomson Atomic Theory." Tutorvista.com. N.p., n.d. Web. 03 Sept. 2013. -
Bibliography Part 2
"Plum Pudding Model." Universe Today RSS. N.p., n.d. Web. 03 Sept. 2013. "Dalton Atomic Theory." Dalton Atomic Theory. N.p., n.d. Web. 04 Sept. 2013. "Dalton and Thomson's Atomic Models - Modern Atomic Theory." Dalton and Thomson's Atomic Models - Modern Atomic Theory. N.p., n.d. Web. 04 Sept. "Rutherford - Atomic Theory." Rutherford - Atomic Theory. N.p., n.d. Web. 04 Sept. 2013. "Rutherford, Ernest: Gold Foil Experiment." -- Kids Encyclopedia. N.p., n.d. Web. 04 Sept. 2013.
