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  • Values Of E M For Positive Particles
    315 words
    Mini-Research ELECTRON- In 1897, Sir J.J. Thomas, an English physicist, measured the deflection of cathode-ray particles in magnetic and electrical fields. As a result he found the ratio of the charge, e, to the mass, m, of the cathode-ray particles. He found e / m identical to those particles irrespective of the metal the electrodes were made of or the kind of gas in the tube. In 1909, RA Millikan, an American scientist, measured that charge. All electrons are found to be identical no matter th...
  • Large Role In Heisenbergs Uncertainty Principle
    1,641 words
    Werner Heisenberg One cannot fully appreciate the work of Werner Heisenberg unless one examines his contributions in the context of the time in which he lived. Werner Karl Heisenberg was born in Wuerzburg, Germany, on December 5, 1901, and grew up in academic surroundings, in a household devoted to the humanities. His father was a professor at the University of Munich and undoubtedly greatly influenced young Werner, who was a student at the Maximilian Gymnasium. Heisenberg had the opportunity to...
  • Dalton's Atomic Theory
    661 words
    The Evolution of the Atomic Theory Rob CongroveB 4 10/23/00 The five atomic theory's of the past two centuries represent the sudden advancement of science in modern times. Begining with a basic theory on the behavior of atoms to the current model, some changes have been made, and some ideas are still the same. Ancient Greek philosophers be lived that everything was made up of invisible particles called at mos. Since then the theory of atoms did not progress untill 1803. John Dalton was the first...
  • Ernest Rutherford Ernest Rutherford
    406 words
    Ernest Rutherford in his Laboratory at McGill University ca. 1903. Ernest Rutherford (1871-1937) Ernest Rutherford is considered the father of nuclear physics. Indeed, it could be said that Rutherford invented the very language to describe the theoretical concepts of the atom and the phenomenon of radioactivity. Particles named and characterized by him include the alpha particle, beta particle and proton. Even the neutron, discovered by James Chadwick, owes its name to Rutherford. The exponentia...
  • Particle Theory Of Light
    867 words
    Many incredible theories about the structure of the atom arose during the turn of the 20th century. Physicists from across the globe searched for answers to so many unknown ideas about the atom. Each time a new idea came about the questions would not stop there. It would only lead to another hypothesis and therefore lead to another quest to find answers. Though the rest of the world was reluctant to embrace the new ideas of the physicists of their time, the theories developed were important step...
  • Rutherford's 1911 Atomic Model
    830 words
    Rutherford's Gold Foil Experiment Rutherford started his scientific career with much success in local schools leading to a scholarship to Nelson College. After achieving more academic honors at Nelson College, Rutherford moved on to Cambridge University " 's Cavendish laboratory. There he was lead by his mentor J.J. Thomson convinced him to study radiation. By 1889 Rutherford was ready to earn a living and sought a job. With Thomson's recommendation McGill University in Montreal accepted him as ...
  • Quantum Theory And Quantum Physics
    1,639 words
    While researching quantum physics, I realized that I had just finished a book that was based on quantum theory. At the time, I didn t quite realize that quantum theory and quantum physics were related except in name. Niels Bohr once said, Anyone who is not shocked by quantum theory has not understood it. He believed this because quantum physics makes the common laws of classical physics false on small scales. First, quantum physics is the physics of the incredibly small. It tries to explain the ...
  • Nuclear And Atomic Physics
    1,285 words
    Historical Development of Atomic StructureYazan FahmawiSept. 30, 1995 T 3 IBS Chemistry Ms. Redman The idea behind the 'atom' goes back to the Ancient Greek society, where scientists believed that all matter was made of smaller, more fundamental particles called elements. They called these particles atoms, meaning 'not divisible. ' Then came the chemists and physicists of the 16th and 17th centuries who discovered various formulae of various salts and water, hence discovering the idea of a molec...
  • Atomic Scientists
    368 words
    Laboratory Write-Up The game in which we participated simulates the early efforts of scientists because they had very little to work with. They too had to guess the size and shape of the atom. In 1911, Rutherford conducted a series of experiments in which he bombarded a piece of gold foil with positively charged alpha particles emitted by radioactive material. Most of the particles passed through the foil undisturbed, suggesting that the foil was made up mostly of empty space rather than of a sh...
  • Protons In The Nucleus Of The Atom
    594 words
    Atoms Atoms are the building blocks of matter. Everything around us is made up of atoms. The atom is more than a million times smaller than the thickness of a human hair. The smallest speck that can be seen under an ordinary microscope contains more than 10 billion atoms. Even though atoms are incredibly tiny, they are made up of even more minute particles: protons, neutrons, and electrons. These are called subatomic particles. Each element has a definite number of subatomic particles, which mak...
  • Electrons Move Around The Circular Path
    591 words
    You have already seen Rutherford Atomic model which was proposed by Ernest Rutherford in the year 1911 and I have told such facts about that model which was not reality encouraged. if it is seen in reality then among the atomic model Rutherford Atomic model was the 1st atomic model which was scientifically (doubt) organized & which in facts (doubt) a lot of conclusions about the atom which was not available there prior in (doubt). In this atomic model Rutherford never came to know what the reali...
  • Certain Numbers Of Electrons The First Shell
    399 words
    Bohr at the Rutherford Lab Everyone at the time imagined the atom as a "plum pudding". That is, it was roughly the same thing throughout, with negatively charged electrons scattered about in it like raisins in a pudding. As part of an experiment with x-rays in 1909, Rutherford was shooting a beam of alpha particles at a sheet of gold foil only 1/3000 of an inch thick, and tracing the particles' paths. Most of the particles went right through the foil, which would be expected if the atoms in the ...
  • Dalton's Atomic Theory John Dalton
    393 words
    Dalton's Atomic Theory John Dalton developed the first useful atomic theory of matter around 1803. In the course of his studies on meteorology, Dalton concluded that evaporated water exists in air as an independent gas. Solid bodies can't occupy the same space at the same time, but water and air could. If the water and air were made of discrete particles, evaporation might be viewed as a mixing of water particles with air particles. He performed a series of experiments on mixtures of gases to de...
  • Deflections Of The Alpha Particles
    387 words
    Ernest Rutherford (1871-1937) Ernest Rutherford was born in Nelson, New Zealand. Rutherford demonstrated his abilities as a scientist early on while working on his B. Sc. at the University of New Zealand in 1894. He showed that the magnetization can be removed from a magnetized iron needle by dissolving the surface layer of the metal in acid. He began work at Cambridge in 1895 and was a professor at the University of Manchester from 1907 on. It is during this time period that Rutherford made his...
  • Atomic Theory
    1,262 words
    In ancient Greek the word atom meant the smallest indivisible particle that could be conceived. The atom was thought of as indestructible; in fact, the Greek word for atom means "not divisible". Knowledge about the size and make up of the atom grew very slowly as scientific theory progressed. What we know / theorize about the atom now began with a core theory devised by Democritus, a Greek philosopher who proposed that matter consisted of various types of tiny discrete particles and that the pro...
  • Rays Like Alpha And Beta Particles
    700 words
    Rutherford was born on August 30, 1871, in Nelson, New Zealand. He was educated at the University of New Zealand and the University of Cambridge. He was a professor of physics at McGill University in Montreal, Quebec from 1989 to 1907. He was also professor at the University of Manchester in England. After 1919 he was professor of experimental physics and director of the Cavendish Lab at the University of Cambridge moreover held a professorship, after 1920, at the Royal Institution of Great Brit...
  • Thomson Plum Pudding Atom 1 3 The
    1,319 words
    1.1 Dalton's Theory - "billiard atom" - Matter is made up of small dense particles called atoms. - Atoms are each element are identical. - Atoms are indestructible. Problems which arose: Because Dalton did not believe that elements could be diatomic, his theory could not explain Gay Lus sacs Law of combining volumes. A Avogadro had solved the problem of correctly determining atomic weights as early as 1811. He also realised that ultimate particles of gases could be diatomic and was the first che...
  • Rutherford's First Researches In New Zealand
    751 words
    Ernest Rutherford was born on August 30, 1871 in Nelson, New Zealand. Rutherford started college young at the age of sixteen he attended Nelson Collegiate School. When he was nineteen he was awarded the university scholarship and went on to the University of New Zealand where he studied mathematics and physical science. He continued with research work at the University until he received an 1851 Exhibition Science Scholarship to Trinity College as a research student under J.J. Thomson. After this...
  • 1982 The Low Energy Anti Proton Ring
    2,390 words
    Introduction - What is antimatter? When you look at yourself in the mirror you see the opposite to you, what if this person really existed? Physicists would call the other you an Anti you. This is basically what antimatter is. It is the exact opposite of matter it has the same mass and theoretically the same properties except that every charge is reversed. In 1905 Albert Einstein wrote down the infamous equation E = mc 2 in other words matter is a concentrated form of energy. It also states that...
  • Negative Charge And The Cathode Rays
    1,452 words
    Joseph John Thomson was born on December 18, 1856 near Manchester, England. His father died when "J.J.. ' was only sixteen. The young Thomson attended Owens College in Manchester, where his professor of mathematics encouraged him to apply for a scholarship at Trinity College, one of the most prestigious of the colleges at Cambridge University. Thomson won the scholarship, and in 1880 finished second in his class in the grueling graduation examination in mathematics. Trinity gave him a fellowship...

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