Preview

Science Atomic Theory Timeline

Good Essays
Open Document
Open Document
1488 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Science Atomic Theory Timeline
Jean-Luc Fernandez 9.4

The start of the atom.

The atom is the basic unit of matter and all life. The history of the study of the atomic nature of matter is the thinking process that goes on in the scientist’s heads. Further progress in the understanding of atoms did not occur until very famous scientist created the atomic theory. Here are some scientists who changed the way we learn about the atom, and the atomic nature of all life.

Ernest Rutherford.

Ernest Rutherford was another scientist that changed the atomic model. Rutherford was studding physics up until his junior years of schooling and since then he had an interest in it. Rutherford was born on the 30 August 1871 in New Zealand. Rutherford was investigating physics everyday he tried lots of experiments.

Rutherford showed that gamma rays were a type of X-ray, and that the alpha and beta rays were tiny particles of matter. Rutherford then showed that the beta particles were electrons.

In 1908 Rutherford demonstrated and made an airtight glass tube with very thin walls, and filled it with the radioactive radium emanation. Alpha particles could penetrate the thin walls of the tube and were collected in a second tube. Rutherford was then inspired to investigate more into Alpha Particles.

Rutherford then began using alpha particles to investigate further into other elements. His theory was if a lot of alpha particles were fired into another substance, it would be then ‘bounced’ off in other directions. Rutherford mentioned his theory to his students and to his surprise a student named Ernest Marsden found out that they bounce off at large angles anywhere.

Ernest Rutherford.

Between 1914 and 1918 (during WW1) Rutherford worked on theories about finding the enemy submarines, while continuing his own investigations of the nucleus and alpha particles. At this time Rutherford was being well known. Just before the breakout of the war he received knight hood from King George V. In that

You May Also Find These Documents Helpful

  • Powerful Essays

    A new atomic theory, in which all atoms of the same element are identical to one another and equal in mass, was proposed by the scientist Dalton. Although the theory had its flaws and was simple, it was revolutionary. Scientists became able to study the actual structure and mass of atoms after the discovery of radioactivity. Soon, isotopes were discovered, as atoms of the same element which have been built up to have different masses.…

    • 1323 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    post lab bean bag isotopes

    • 1188 Words
    • 5 Pages

    A new atomic theory, in which all atoms of the same element are identical to one another and equal in mass, was proposed by the scientist Dalton. Although the theory had its flaws and was simple, it was revolutionary. Scientists became able to study the actual structure and mass of atoms after the discovery of radioactivity. Soon, isotopes were discovered, as atoms of the same element which have been built up to have different masses.…

    • 1188 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Werner Heisenberg worked right around the time of James Chadwick. He discovered that neutrons, electrons and protons do not have a direct connection. His discoveries introduced atomic physics. He found out that the number of neutrons are not always the same. One thing led to another and the discoveries of Heisenberg helped to create the nuclear bomb.…

    • 759 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    16. Before his experiment, Rutherford expected the particles to deflect to the sides of the gold foil. False…

    • 466 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    (McPhee, 2010) The scientists of the 19th centuries renewed their interest in the Atomic Theory •John Dalton suggested that all matter was composed of small particles - atoms, each element had a different atom and a different atomic weight, theorized that atoms could not be created or destroyed in chemical reactions (1804) •In his attempt to classify the elements by principles, Dmitri Mendeleev arranged the elements by their atomic weight, discovering the existence of periodicity of the atoms (1869) •J.J. Thomson discovered electrons through his cathode ray experiment and proved that atoms were divisible(1897) (McPhee, 2010), ("A brief history," 2005) 20th century concepts and discoveries •Earnest Rutherford discovered that there was a small, dense positively charged nucleus, predicted the existence of neutrons, stated that electrons move rapidly in the empty space around the nucleus (1909-11) •In continuation of his experiments J.J. Thompson determined that all particles had charges that were multiples of the same number •In 1913 Robert Millikan accurately determined the mass of election…

    • 809 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Six scientists were chosen to see which one had made the greatest contribution to our current understanding of the atom’s structure. Our knowledge of an atom’s appearance and structure have evolved from years and years of development and contribution from many different scientists. Scientist Ernest Rutherford had been the best contributor to the understanding of the atomic structure. Why Rutherford was chosen is because his work had information on protons, neutrons, and electrons, the main components that make up the atom, showed what the atom looks like when the three are put together, and had also been the discoverer of the nucleus which is the one of them most important parts of the atom’s structure.…

    • 793 Words
    • 4 Pages
    Good Essays
  • Better Essays

    They discovered that those cathode rays were a stream of negatively charged particles which they called electrons. The exact value of the negative charge was not known (was it 2-, 3-, 9-, 1-?).…

    • 5272 Words
    • 22 Pages
    Better Essays
  • Good Essays

    Experiment: Neutral atoms sealed in a cathode ray tube produce a beam of particles that are attracted to the positive end of a magnet, but repelled by the negative end.…

    • 769 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    Ernest Rutherford conducted the Gold-Foil experiment in 1911. The Gold-Foil experiment resulted in the nuclear atom. Rutherford proposed that all of the positively charged particles were on the inside of the atom. In 1920 he first referred to the hydrogen nucleus as a proton. Also in 1920, Rutherford proposed the existence of a third particle in the atom called the…

    • 61 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    John Dalton Theory

    • 762 Words
    • 4 Pages

    As shown throughout the research, there are many other scientists and chemists who contributed their intelligence into the development of the atomic theory. Each evaluated and revised the atomic theory over the years to incorporate new findings such as, the existence of atomic isotopes and the conversion of mass and energy. Although over several decades many have changed the atomic theory, Dalton still has an impact and his importance is relevant in the development of the atomic…

    • 762 Words
    • 4 Pages
    Good Essays
  • Good Essays

    It took many scientists and philosophers hundreds even thousands of years to come up with an accurate atomic theory. For nearly 2,000 years science was unable to come up with experiments that were able to test and put forth the theories made up by Democritus which was a fifth century B.C. Greek philosopher. In 1803, John Dalton, who viewed the atom as a small solid sphere, and is credited for the developing of the first coherent atomic theory was now in the picture. This all led to the the first periodic table of the elements, and the history of the atom.…

    • 446 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Hans Geiger

    • 3289 Words
    • 14 Pages

    Since alpha particles can penetrate thin walls of solids, Rutherford and Geiger presumed that they could also move through atoms. Geiger designed a machine that would shoot alpha particles through gold foil onto a screen, where they were observed as tiny flashes of light. Counting the thousands of flashes per minute was a long, hard task. Geiger decided to try…

    • 3289 Words
    • 14 Pages
    Good Essays
  • Good Essays

    Ernest Rutherford was born at Spring Grove near Nelson, New Zealand to a farmer named James Rutherford and his wife Martha Thompson. James had immigrated to New Zealand from Perth, Scotland to raise a home and a family. Ernest studied at Havelock School then Nelson College where he was studying when he won a scholarship to study at Canterbury College, the University of New Zealand. After gaining his Bachelor of Arts, Master of Arts, and Bachelor of Science Ernest took two years for research at the forefront of electrical technology before traveling to England for postgraduate study at the Cavendish Laboratory at Cambridge University. In 1898 Rutherford succeed Hugh Callendar in the chair of Macdonald Professor of physics at McGill University in Montreal, Canada. In 1900 he gained a Doctor of Science from the University of New Zealand and married Mary Georgina Newton. Still a professor at McGill University, Rutherford does his investigations into the disintegration of the elements, and the chemistry of radioactive substances that gets him to earn the Nobel Prize in Chemistry 1908.…

    • 858 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Not long after the discoveries of Democritus a very famous philosopher; Aristotle made his opinions known that he believed there was no such thing as atoms and that everything is simply composed of the four elements; earth, fire, air and water. This was a new beginning for the atomic theory, although not a good one, creating what could be called a 'dark age' for science. As Aristotle taught what he thought to many people it lead to the discoveries of Democritus being overlooked for over 2000 years. Due to the work of Aristotle he dramatically slowed down the evolution of the atomic theory, mainly because he was a philosopher and not a scientist.…

    • 2560 Words
    • 7 Pages
    Powerful Essays
  • Good Essays

    Ernest went to Government schools as a child. At the age of sixteen Ernest Rutherford went to Nelson Collegiate School and obtained a scholarship. Ernest Rutherford went to the University of New Zealand. Ernest Rutherford's early research was on magnetic properties, but then Ernest Rutherford moved to nuclear chemistry. Frederick Soddy and Ernest Rutherford both looked into the ‘Disintegration theory” of radioactivity. Ernest Rutherford researched the properties of radium and alpha rays. Ernest Rutherford accomplished making a nitrogen nuclei turn into an oxygen nuclei, by the transmutation of alpha particles. The Nobel Prize in Chemistry 1908 was awarded to Ernest Rutherford "for his investigations into the disintegration of the elements, and the chemistry of radioactive…

    • 1133 Words
    • 5 Pages
    Good Essays