COPY: Chemistry Unit 2: Structure of Atom
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COPY: Chemistry Unit 2: Structure of Atom

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Questions and Answers

What subatomic particles were discovered in the nineteenth and twentieth centuries?

  • Neutrons, neutrinos, and electrons
  • Muons, bosons, and fermions
  • Protons, neutrons, and electrons (correct)
  • Photons, positrons, and electrons

    • What did Michael Faraday's experiments on electrical discharge through gases suggest?

  • The particulate nature of electricity (correct)
  • The wave nature of electricity
  • The magnetic nature of electricity
  • The atomic nature of electricity

    • Who first proposed the atomic theory of matter?

  • Einstein
  • John Dalton (correct)
  • Michael Faraday
  • Faraday and Dalton together

    • Who began to study electrical discharge in partially evacuated tubes in the mid-1850s?

    <p>Michael Faraday</p> Signup and view all the answers

    What did Dalton's atomic theory successfully explain?

    <p>The law of conservation of mass</p> Signup and view all the answers

    What are the two subatomic particles discussed in this section?

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

    What did the experiments on electrical discharge through gases provide an insight into?

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

    Which scientific laws were successfully explained by Dalton's atomic theory?

    <p>Law of conservation of mass, law of constant composition, and law of multiple proportion</p> Signup and view all the answers

    What is the meaning of the word 'atom' derived from the Greek word 'a-tomio'?

    <p>Uncutable or non-divisible</p> Signup and view all the answers

    Who were of the view that atoms are the fundamental building blocks of matter?

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

    What did the Indian and Greek philosophers propose about atoms?

    <p>Atoms are the fundamental building blocks of matter</p> Signup and view all the answers

    What is the unit of structure discussed in this unit?

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

    What does the quantum mechanical model of atom describe?

    <p>Atom's internal structure</p> Signup and view all the answers

    What is the significance of the discovery of electron, proton and neutron?

    <p>Traces differences in chemical behavior of elements</p> Signup and view all the answers

    What was the significance of the early Indian and Greek philosophers' proposal about atoms?

    <p>It introduced the idea that atoms are fundamental building blocks of matter.</p> Signup and view all the answers

    What did the early Indian and Greek philosophers mean by the word 'atomio'?

    <p>Non-divisible</p> Signup and view all the answers

    What did the discovery of electron, proton, and neutron lead to?

    <p>Development of quantum mechanical model of atom</p> Signup and view all the answers

    What did the experiments on electrical discharge through gases suggest according to the text?

    <p>Existence of atoms as fundamental building blocks</p> Signup and view all the answers

    What is the nature of electromagnetic radiation according to the text?

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

    Which principle defines the maximum multiplicity in an atom's electronic configuration?

    <p>Hund's rule</p> Signup and view all the answers

    Which scientist first proposed the atomic theory of matter on a firm scientific basis?

    <p>John Dalton</p> Signup and view all the answers

    What were the major problems faced by scientists in the nineteenth and twentieth centuries regarding the atom?

    <p>Explaining the formation of different kinds of molecules by the combination of different atoms</p> Signup and view all the answers

    What did Michael Faraday's experiments on electrical discharge through gases suggest?

    <p>The particulate nature of electricity</p> Signup and view all the answers

    In what year did John Dalton propose his atomic theory of matter?

    <p>1808</p> Signup and view all the answers

    Which subatomic particles were discovered in the mid-1850s by scientists studying electrical discharge in partially evacuated tubes?

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

    What did the experiments on electrical discharge through gases provide an insight into?

    <p>The particulate nature of electricity</p> Signup and view all the answers

    Which laws were successfully explained by Dalton's atomic theory?

    <p>Law of conservation of mass, law of constant composition, and law of multiple proportion</p> Signup and view all the answers

    What was the main contribution of Michael Faraday’s experiments on electrical discharge through gases?

    <p>Evidence for the particulate nature of electricity</p> Signup and view all the answers

    What was the focus of scientists studying electrical discharge in partially evacuated tubes in the mid-1850s?

    <p>The particulate nature of electricity and its impact on chemical reactions</p> Signup and view all the answers

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