Atomic and nuclear physics basics solution
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The document contains 30 multiple choice questions about atomic and nuclear physics basics. It covers topics like atomic mass unit, isotopes, nuclear reactions, models of the atom, nuclear properties, radioactivity, and other fundamental concepts. The questions are designed to test understanding of key terminology, relationships, quantities and principles in atomic and nuclear physics.
![Atomic And Nuclear Physics Basics
1.Which of the following is equivalent to 1 a.m.u?
[A] 1/12th of the mass of the helium atom
[B] 1/12th of the mass of the hydrogen atom
[C] 1/12th of the mass of the oxygen atom
[D] 1/12th of the mass of the carbon atom
2.What of following is equivalent to 1 a.m.u?
[A] 1.660539 x 10-18
kg
[B] 1.660539 x 10-21
kg
[C] 1.660539 x 10-24
kg
[D] 1.660539 x 10-27
kg
3.Which of the following element has an isotope named as
Tritium?
[A] Helium
[B] Carbon
[C] Titanium
[D] Hydrogen
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![Atomic And Nuclear Physics Basics
4.What do we call the atomic species of the same element
differing in mass?
[A] Isobars
[B] Isotopes
[C] Isomers
[D] Such species don’t exist
5.Which of the following gives us the mass number of an atom?
[A] total number of electrons
[B] total number of neutrons
[C] total number of nucleons
[D] None of the above
6.What do we call the nuclides having same mass number?
[A] Isotopes
[B] Isobars
[C] Isotones
[D] Such species don’t exist
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Atomic and nuclear physics basics solution
- 1. Atomic And Nuclear Physics Basics 1.Which of the following is equivalent to 1 a.m.u? [A] 1/12th of the mass of the helium atom [B] 1/12th of the mass of the hydrogen atom [C] 1/12th of the mass of the oxygen atom [D] 1/12th of the mass of the carbon atom 2.What of following is equivalent to 1 a.m.u? [A] 1.660539 x 10-18 kg [B] 1.660539 x 10-21 kg [C] 1.660539 x 10-24 kg [D] 1.660539 x 10-27 kg 3.Which of the following element has an isotope named as Tritium? [A] Helium [B] Carbon [C] Titanium [D] Hydrogen Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 2. Atomic And Nuclear Physics Basics 4.What do we call the atomic species of the same element differing in mass? [A] Isobars [B] Isotopes [C] Isomers [D] Such species don’t exist 5.Which of the following gives us the mass number of an atom? [A] total number of electrons [B] total number of neutrons [C] total number of nucleons [D] None of the above 6.What do we call the nuclides having same mass number? [A] Isotopes [B] Isobars [C] Isotones [D] Such species don’t exist Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 3. Atomic And Nuclear Physics Basics 7.What is Mass defect of a nucleus? [A] difference between mass of a nucleus and its constituents [B] sum of the mass of a nucleus and its constituents [C] difference between mass of a neutron and mass of proton [D] sum of mass of a neutron and mass of proton 8.Which of the following is correct? [A] The nuclear force does not depend on the electric charge [B] The nuclear force is much weaker than the Coulomb force [C] Both a and b [D] None of the above 9.Which of the following is the name given to electrons moving at high speed? [A] Alpha particles [B] Beta particles [C] Gamma particles [D] None Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 4. Atomic And Nuclear Physics Basics 10.Which of the following is a limitation of Bohr’s model of atom? [A] it does not explain why orbits of electrons are taken as circular [B] it does not take into account the wave nature of electrons [C] Both a and b [D] None 11.What is the process which causes the elimination of one or more electrons from the atomic shell known as? [A] Excitation [B] Ionisation [C] Diffusion [D] Refraction 12.What is the SI unit of radioactivity? [A] Becquerel [B] candela [C] curie [D] Henry Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 5. Atomic And Nuclear Physics Basics 13.Which of the following statements related to the unit curie (Ci) is correct? [A] 1 Ci = 3.7 × 107 [B] 1 Ci = 2.7 × 109 [C] 1 Ci = 2.7 × 107 [D] 1 Ci = 3.7 × 1010 14.What is the source of energy in nuclear reactors which produce electricity? [A] Nuclear Fission [B] Nuclear Fusion [C] Gamma decay [D] None of the above 15.What is the fuel in the Sun? [A] Helium [B] Hydrogen [C] Oxygen [D] Carbon dioxide Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 6. Atomic And Nuclear Physics Basics 16.Which of the following nuclear processes is the source of energy output in the interior of stars? [A] Nuclear Fission [B] Nuclear Fusion [C] Both a and b [D] None 17.What are the nuclei of different atoms containing same number of neutrons known as? [A] Isobars [B] Isotopes [C] Isotones [D] Isomers 18.What is the energy equivalence of one atomic mass unit? [A] 93.125 eV [B] 931.25 eV [C] 9.31 eV [D] 0.93125 eV Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 7. Atomic And Nuclear Physics Basics 19.What do we call the energy which should be supplied to the nucleus to break it up into its constituent particles? [A] Excitation energy [B] Binding energy [C] Ionisation energy [D] None of the above 20.What do we call the phenomenon of spontaneous disintegration of the nucleus of an atom? [A] Nuclear Fusion [B] Ionisation [C] Radioactivity [D] Covalent Bonding 21.Which of the following is correct? [A] 1 rutherford (Rd) = 103 decays/second [B] 1 rutherford (Rd) = 104 decays/second [C] 1 rutherford (Rd) = 105 decays/second [D] 1 rutherford (Rd) = 106 decays/second Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 8. Atomic And Nuclear Physics Basics 22.What is meant by Atomic number of an atom? [A] total number of protons [B] total number of electrons in an uncharged atom [C] Both a and b [D] None 23.Which of the following is a commonly used moderator in a Nuclear reactor? [A] Heavy water [B] Graphite [C] Water [D] All of the above 24.Which of the following material is commonly used to make control rods in a nuclear reactor? [A] Indium [B] Boron [C] Cadmium [D] All of the above Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 9. Atomic And Nuclear Physics Basics 25.Which of these rays have the highest penetrating power? [A] Alpha [B] Beta [C] Gamma [D] All have the same 26.Which of these rays have the highest ionising power? [A] Alpha [B] Beta [C] Gamma [D] All have the same 27.Which of the following metal foils was used in the Rutherford’s alpha particle scattering experiment? [A] Copper [B] Silver [C] Gold [D] Aluminium Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 10. Atomic And Nuclear Physics Basics 28.What is the value of Rydberg constant? [A] 1.0973 x 103 m-1 [B] 1.0973 x 105 m-1 [C] 1.0973 x 107 m-1 [D] 1.0973 x 109 m-1 29.Which of the following represents the angular momentum of an electron as per Bohr’s model (h= Planck’s constant)? [A] h/π [B] nh/2π [C] 2πnh [D] πnh 30.What is the value of Planck’s constant? [A] 6.6 × 10–34 J s [B] 3.6 × 10–34 J s [C] 6.6 × 10–24 J s [D] 6.6 × 10–17 J s Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com