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1.1 Atomic Theory

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  • What is the nucleus mostly made of?
    Protons and neutrons
    Electrons and protons
  • What model did Thomson propose?
    Nuclear model
    Plum pudding model
  • Which scientist proposed the nuclear model?
    Rutherford
    Dalton
  • What does the modern atomic model show?
    Electrons are fixed inside the nucleus
    Electrons exist in regions around the nucleus
  • Which particle has no charge?
    Electron
    Neutron
  • Where are neutrons found?
    Nucleus
    Outside the atom
  • Which particle has a positive charge?
    Neutron
    Proton
  • Where are protons found?
    Electron cloud
    Nucleus
  • What did Rutherford's experiment show?
    Atoms are solid spheres
    Atoms have a small dense nucleus
  • Where are electrons found?
    Electron cloud
    Nucleus
  • What is the charge of a neutron?
    Neutral
    Positive
  • Which particle has a negative charge?
    Proton
    Electron
  • Which two particles are found in the nucleus?
    Protons and neutrons
    Protons and electrons
  • What did Dalton say atoms were?
    Mostly empty space
    Solid indivisible spheres
  • What is the charge of an electron?
    Positive
    Negative
  • What is the charge of a proton?
    Negative
    Positive
  • Who discovered the electron?
    Thomson
    Rutherford
  • Which model is accepted today?
    Modern atomic model
    Dalton's solid-sphere model
  • Which particle has the smallest mass?
    Electron
    Proton
  • Who proposed the solid-sphere model of the atom?
    Dalton
    Thomson
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