Time Left:
600
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2. Which one of the following statements about the atomic nucleus is accurate?
A. The nucleus is held together mostly by the electrical and gravitational forces
B. Large nuclei are denser than light nuclei
C. All nuclei have nearly the same density
D. Smaller nuclei are denser than larger nuclei
3. Nucleus ''a'' contains 5 protons and 5 neutrons and has radius R. The radius of nucleus ''b'', which contains 35 protons and 45 neutrons, is closest to:
A. 2R
B. 8R
C. 1.4R
D. R
4. Binding energy per nucleon is the ratio of
A. the binding energy of the nucleus to the number of nucleons in that nucleus.
B. energy required to remove a nucleon to atomic weight
C. binding energy of a nucleon to the atomic number
D. binding energy of a nucleus to the atomic number
5. The atomic number Z of the nucleus is
A. Number of deutrons.
B. Number of neutrons in it.
C. Number if electrons in it.
D. Number of protons in it.
6. The density of nuclear matter is:
A. independent of the number of nucleons in the nucleus
B. directly proportional to the number of neutrons in the nucleus
C. directly proportional to the number of protons in the nucleus
D. directly proportional to the square of the number of nucleons in the nucleus
7. The radius of a nucleus is directly proportional to (A=mass number)
A. A1/3
B. A2
C. A3
D. A1/2
8. The volume of atom in comparison of volume of nucleus is of the order of
A. 1015
B. 105
C. 1025
D. 1030
9. The average binding energy of nucleus is
A. 8 BeV
B. 8 Mev
C. 8 eV
D. 8 KeV
10. The number of electrons in an atom X of atomic number Z and mass number A is
A. Zero
B. A
C. Z
D. A-Z
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