Atomic Structure and Models Quiz
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Questions and Answers

Who proposed the existence of atoms as the fundamental building blocks of matter?

  • Twentieth-century chemists
  • Nineteenth-century scientists
  • Early Indian and Greek philosophers (correct)
  • Modern physicists
  • What is the origin of the word 'atom'?

  • Sanskrit word 'a-tama' meaning 'invisible'
  • Arabic word 'atoom' meaning 'fundamental'
  • Latin word 'atomus' meaning 'indivisible'
  • Greek word 'a-tomio' meaning 'uncut-able' (correct)
  • What did the early Indian and Greek philosophers believe about atoms?

  • Atoms are divisible into smaller particles
  • Atoms can be destroyed by chemical reactions
  • Atoms are made up of protons, neutrons, and electrons
  • Atoms are the fundamental building blocks of matter (correct)
  • When were the earlier ideas about atoms revived again by scientists?

    <p>Nineteenth century</p> Signup and view all the answers

    What is the main characteristic of atoms according to the Indian and Greek philosophers?

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

    Which scientist proposed the atomic model that describes the atom as a positively charged 'pudding' with negatively charged electrons embedded throughout?

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

    What is the key feature of the quantum mechanical model of the atom?

    <p>Quantized energy levels</p> Signup and view all the answers

    Which principle states that no two electrons in an atom can have the same four quantum numbers?

    <p>Pauli exclusion principle</p> Signup and view all the answers

    What did Planck's quantum theory explain about the nature of electromagnetic radiation?

    <p>The quantization of energy</p> Signup and view all the answers

    According to the de Broglie relation, what is associated with moving particles such as electrons?

    <p>Wave properties</p> Signup and view all the answers

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