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1. The binding energy of a nucleus is

A. The energy required to break the nucleus into its constituent nucleons B. The total energy of the nucleus C. The energy required to form the nucleus D. The energy required to ionize the nucleus

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2. The concept of nuclear fission was first proposed by

A. Lise Meitner B. Otto Hahn C. Albert Einstein D. Niels Bohr

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3. The energy of the emitted photon in the Bohr model of the hydrogen atom when the electron transitions from n=3 to n=2 is

A. 13.6 eV B. 1.51 eV C. 2.55 eV D. 0.85 eV

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4. The energy associated with the ground state of the hydrogen atom is

A. 13.6 eV B. 0 eV C. -13.6 eV D. -1.51 eV

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5. In the Bohr model of the hydrogen atom, the angular momentum of the electron is quantized as

A. nh/2π B. nh C. h/n D. n^2h

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6. The half-life of a radioactive substance is 10 years. How much time is required for its quantity to decay to one-sixteenth of the initial amount?

A. 40 years B. 20 years C. 30 years D. 10 years

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7. The process of electron capture in a nucleus results in

A. The conversion of a proton into a neutron B. The emission of a beta particle C. The emission of a photon D. The formation of a positron

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8. The binding energy of the nucleus of a hydrogen atom is

A. 13.6 eV B. 0 eV C. 1 eV D. -13.6 eV

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9. The energy of an alpha particle is released during

A. Alpha decay B. Beta decay C. Gamma decay D. Electron capture

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10. The isotope of hydrogen that contains one proton and one neutron is called

A. Deuterium B. Tritium C. Protium D. Hydrogen-1

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11. The ionization energy of the hydrogen atom is equal to

A. 13.6 eV B. 3.6 eV C. 6.8 eV D. 1.6 eV

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12. The mass defect of a nucleus is

A. The difference between the mass of the nucleus and the sum of the masses of its constituent nucleons B. The difference between the mass of the nucleus and the sum of the masses of the electrons C. The mass of the electrons in a nucleus D. The mass of the protons and neutrons in the nucleus

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13. In the Bohr model of the hydrogen atom, when an electron jumps from n=4 to n=2, it emits radiation corresponding to

A. Lyman series B. Balmer series C. Paschen series D. Brackett series

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14. The angular momentum of an electron in the nth orbit of a hydrogen atom is quantized as

A. nh/2π B. nh C. h/n D. n^2h

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15. The frequency of the radiation emitted when an electron in a hydrogen atom jumps from n=3 to n=2 is

A. 1.51 x 10^15 Hz B. 2.55 x 10^15 Hz C. 2.51 x 10^14 Hz D. 3.00 x 10^16 Hz

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16. The energy required to remove the electron from the ground state of hydrogen is

A. 13.6 eV B. 3.6 eV C. 6.8 eV D. 1.6 eV

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17. The concept of nuclear fusion was first proposed by

A. Eugen Goldstein B. Albert Einstein C. Marie Curie D. Hans Bethe

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18. The primary reason for the emission of radiation in the Bohr model is

A. Electron transition between energy levels B. Electron gaining energy C. Electron moving in a circular orbit D. Electron emitting a photon

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19. The total energy of an electron in the nth orbit of a hydrogen atom is given by

A. -13.6/n^2 eV B. 13.6/n^2 eV C. -13.6n^2 eV D. 13.6n^2 eV

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20. The radius of the nth orbit of an electron in a hydrogen atom is proportional to

A. n^2 B. n C. 1/n D. 1/n^2