Thomson's Plum Pudding Model of Atom
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Questions and Answers

What was the name given to the rays produced by electrons striking a material in the cathode ray tubes?

  • X-rays (correct)
  • Röentgen rays
  • Cathode rays
  • Anode rays
  • What was the radius of the atom according to Thomson's model?

  • 10^3 m
  • 10^(-20) m
  • 10^(-10) m (correct)
  • 10^(-5) m
  • What was the arrangement of electrons in Thomson's model of the atom?

  • Electrons were embedded in a uniform distribution of positive charge (correct)
  • Electrons were arranged in a linear pattern
  • Electrons were arranged in a random manner
  • Electrons were arranged in a circular pattern
  • What was the assumption about the mass of the atom in Thomson's model?

    <p>The mass of the atom was uniformly distributed</p> Signup and view all the answers

    What was the limitation of Thomson's model?

    <p>It was not consistent with the results of later experiments</p> Signup and view all the answers

    What was the significance of Röentgen's discovery in 1895?

    <p>It showed that X-rays can cause fluorescence in certain materials</p> Signup and view all the answers

    What is the Greek word from which the term 'atom' has been derived?

    <p>a-tomio</p> Signup and view all the answers

    Who among the following ancient philosophers proposed the existence of atoms?

    <p>Both Indian and Greek philosophers</p> Signup and view all the answers

    What is the name of the scientist who proposed the model of an atom in which an atom is like a sphere of positively charged matter with negatively charged electrons embedded in it?

    <p>J.J. Thomson</p> Signup and view all the answers

    What are the three fundamental particles that make up an atom?

    <p>Proton, electron, neutron</p> Signup and view all the answers

    In the Thomson model of an atom, what is the negatively charged particle embedded in the positively charged sphere?

    <p>Electron</p> Signup and view all the answers

    What was the limitation of the ancient philosophical ideas about atoms?

    <p>They were not based on experimental evidence</p> Signup and view all the answers

    What was the major flaw in Thomson's model of the atom as revealed by Rutherford's gold foil experiment?

    <p>The positive charge was spread throughout the atom</p> Signup and view all the answers

    What is the approximate size of the nucleus compared to the atom?

    <p>1/100,000th the size of the atom</p> Signup and view all the answers

    What is the primary region of the atom where most of the mass and positive charge are concentrated?

    <p>Nucleus</p> Signup and view all the answers

    What is the analogy used to describe the structure of the atom in Rutherford's model?

    <p>Solar system</p> Signup and view all the answers

    What was the key observation that led Rutherford to propose the nuclear model of the atom?

    <p>Some alpha particles were deflected</p> Signup and view all the answers

    What is the approximate size of the atom's radius if a cricket ball represents the nucleus?

    <p>5 km</p> Signup and view all the answers

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