Dalton's Atomic Theory Quiz
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Questions and Answers

Which subatomic particles were discovered towards the end of the nineteenth century?

  • Neutrons, positrons, and photons
  • Electrons, protons, and neutrons (correct)
  • Elephants, giraffes, and lions
  • Atoms, molecules, and compounds
  • What did Dalton's atomic theory propose about the atom?

  • It is the smallest indivisible constituent of all matter. (correct)
  • It is made up of electrons, protons, and neutrons.
  • It can explain the law of conservation of energy.
  • It discovered the law of multiple proportions.
  • What is the charge of electrons?

  • Positive
  • Variable
  • Negative (correct)
  • Neutral
  • Which particle is uncharged in nature?

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

    What did experiments towards the end of the nineteenth century show about Dalton's atom?

    <p>It is made up of even smaller particles.</p> Signup and view all the answers

    What did Dalton's atomic theory propose regarding the atom's divisibility?

    <p>The atom is indivisible and the smallest constituent of matter.</p> Signup and view all the answers

    Which subatomic particles were discovered towards the end of the nineteenth century?

    <p>Electrons, protons, and neutrons</p> Signup and view all the answers

    What are the charges of electrons, protons, and neutrons, respectively?

    <p>Negative, positive, negative</p> Signup and view all the answers

    How did experiments in the nineteenth century challenge Dalton's atomic theory?

    <p>By proving that atoms can be divided into smaller particles.</p> Signup and view all the answers

    Why is it said that an atom is not the smallest indivisible particle of matter according to the text?

    <p>Because atoms are divisible into electrons, protons, and neutrons.</p> Signup and view all the answers

    Study Notes

    Subatomic Particles and Dalton's Atomic Theory

    • Towards the end of the 19th century, electrons, protons, and neutrons were discovered as subatomic particles.

    Dalton's Atomic Theory

    • Proposed that atoms are indivisible and cannot be created or destroyed.
    • Implied that atoms are the smallest units of matter.

    Charges of Subatomic Particles

    • Electrons have a negative charge.
    • Protons have a positive charge.
    • Neutrons are uncharged in nature.

    Challenges to Dalton's Atomic Theory

    • Experiments towards the end of the 19th century showed that atoms are not indivisible and can be broken down into smaller subatomic particles.
    • Challenged Dalton's proposal that atoms are indivisible and cannot be broken down further.

    Limitations of Dalton's Atomic Theory

    • Atoms are not the smallest indivisible particles of matter, as they can be broken down into subatomic particles like electrons, protons, and neutrons.

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    Description

    Test your knowledge on Dalton's atomic theory, which proposed in 1803 that atoms are the smallest indivisible constituents of all matter. Learn about the laws of conservation of mass, constant composition, and multiple proportions. Discover how experiments towards the end of the nineteenth century challenged Dalton's theory regarding the indivisibility of the atom.

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