Exploring Atomic Theory and Structure

Who is known for the "Plum Pudding" model of the atom?

• Democritus

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

Which experiment led to the discovery of the nucleus?

• Cathode Ray Experiment

• Gold Foil Experiment

• Oil Drop Experiment

• Atomic Emission Spectra

What is the primary contribution of Niels Bohr to atomic theory?

• Discovery of the neutron

• Development of the quantum mechanical model

• Explanation of atomic emission spectra

• Discovery of the electron

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Which scientist is credited with the discovery of the neutron?

• James Chadwick

• Ernest Rutherford

• J.J. Thomson

• Niels Bohr

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Which scientist is did the Cathode Ray experiment?

• James Chadwick

• Ernest Rutherford

• J.J. Thomson

• Niels Bohr

What does the atomic number of an element represent?

• Number of protons

• Number of neutrons

• Number of electrons

• Sum of protons and neutrons

Which force holds the nucleus of an atom together?

• Gravitational force

• Electrostatic force

• Strong nuclear force

• Weak nuclear force

What is the mass number of an atom?

• Number of protons

• Number of electrons

• Sum of protons and neutrons

• Number of neutrons

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Who proposed the solid sphere model of the atom?

• Democritus

• John Dalton

• J.J. Thomson

• Ernest Rutherford

Which scientist used mathematical equations and quantum mechanics to describe an atom?

• Niels Bohr

• J.J. Thomson

• Erwin Schrödinger

• James Chadwick