Structure of the Atom Quiz
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Questions and Answers

Who was the first scientist to propose a model for the structure of an atom?

  • Dalton
  • J.J. Thomson (correct)
  • Einstein
  • E. Goldstein
  • What are canal rays according to the text?

  • Neutral radiations
  • Negatively charged radiations
  • Positively charged radiations (correct)
  • High-energy photons
  • How are electrons and protons represented in general according to the text?

  • 'e-' and 'p'
  • 'e+' and 'p+'
  • 'e+' and 'p-'
  • 'e-' and 'p+' (correct)
  • What did Dalton's atomic theory suggest, which was contradicted by the discovery of electrons and protons?

    <p>Atoms are indestructible</p> Signup and view all the answers

    What was the charge and mass of the sub-atomic particle discovered by E. Goldstein according to the text?

    <p>Charge: plus one, Mass: approximately 2000 times that of an electron</p> Signup and view all the answers

    What was one of the first indications that atoms are not indivisible?

    <p>The study of static electricity</p> Signup and view all the answers

    What did the scientists at the end of the 19th century aim to reveal?

    <p>The structure and properties of the atom</p> Signup and view all the answers

    What is the fundamental building block of matter according to Chapter 3?

    <p>Atoms and molecules</p> Signup and view all the answers

    What was one of the major challenges before the scientists at the end of the 19th century?

    <p>To reveal the structure of the atom and explain its properties</p> Signup and view all the answers

    What does Chapter 4 aim to explain?

    <p>The arrangement of sub-atomic particles</p> Signup and view all the answers

    What was the model proposed by J.J. Thomson for the structure of an atom?

    <p>Thomson proposed the model of an atom to be similar to that of a Christmas pudding.</p> Signup and view all the answers

    Who discovered the presence of canal rays in a gas discharge?

    <p>E. Goldstein discovered the presence of canal rays in a gas discharge.</p> Signup and view all the answers

    What is the charge and mass of a proton?

    <p>The charge of a proton is plus one and its mass is approximately 2000 times that of an electron.</p> Signup and view all the answers

    How did the discovery of electrons and protons impact Dalton's atomic theory?

    <p>The discovery of electrons and protons inside the atom led to the failure of the aspect of Dalton's atomic theory that suggested the atom was indivisible and indestructible.</p> Signup and view all the answers

    What did E. Goldstein's discovery of canal rays ultimately lead to?

    <p>E. Goldstein's discovery of canal rays ultimately led to the discovery of another sub-atomic particle known as the proton.</p> Signup and view all the answers

    What were the two primary questions that arose regarding the structure of the atom?

    <p>What makes the atom of one element different from the atom of another element? Are atoms really indivisible, as proposed by Dalton, or are there smaller constituents inside the atom?</p> Signup and view all the answers

    What was the major challenge faced by scientists at the end of the 19th century?

    <p>To reveal the structure of the atom as well as to explain its important properties.</p> Signup and view all the answers

    What were some of the first indications that atoms are not indivisible?

    <p>The study of static electricity and the condition under which electricity is conducted by different substances.</p> Signup and view all the answers

    What were the two activities suggested for understanding the nature of charged particles in matter?

    <p>Comb dry hair and observe if the comb attracts small pieces of paper. Rub a glass rod with a silk cloth and bring the rod near an inflated balloon.</p> Signup and view all the answers

    What did scientists aim to elucidate based on a series of experiments at the end of the 19th century?

    <p>The structure of the atom and its important properties.</p> Signup and view all the answers

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