Composition and Size of Nucleus (Atomic Masses, Mass-Energy Relation, Mass Defect...) NEET Questions

Physics - Atoms and Nuclei

Composition and Size of Nucleus (Atomic Masses, Mass-Energy Relation, Mass Defect...) MCQ Questions


7.
Atoms with the same atomic number (Z) but different mass numbers (A) are called:
A.
Isotones
B.
Isomers
C.
Isobars
D.
Isotopes
😑 View Answer Rough Work Error
ANSWER :
D. Isotopes
8.
Atoms with the same mass number (A) but different atomic numbers (Z) are called:
A.
Isomers
B.
Isotones
C.
Isobars
D.
Isotopes
😑 View Answer Rough Work Error
ANSWER :
C. Isobars
9.
Atoms with the same number of neutrons (N) but different atomic numbers are called:
A.
Isotopes
B.
Isomers
C.
Isobars
D.
Isotones
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ANSWER :
D. Isotones
10.
Hydrogen has three isotopes — protium (¹H), deuterium (²H), and tritium (³H). These differ in:
A.
Number of neutrons
B.
Number of electrons
C.
Number of protons
D.
Atomic number
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ANSWER :
A. Number of neutrons
11.
The radius of a nucleus with mass number A is given by:
A.
R = R₀ A
B.
R = R₀ A^(1/3)
C.
R = R₀ / A
D.
R = R₀ A²
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ANSWER :
B. R = R₀ A^(1/3)
12.
The constant R₀ in the nuclear radius formula R = R₀ A^(1/3) has the approximate value:
A.
1.2 × 10⁻¹⁰ m
B.
1.2 × 10⁻⁵ m
C.
1.2 × 10⁻²⁰ m
D.
1.2 fm (1.2 × 10⁻¹⁵ m)
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ANSWER :
D. 1.2 fm (1.2 × 10⁻¹⁵ m)