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


1.
The nucleus of an atom contains:
A.
Neutrons and electrons
B.
Protons and neutrons
C.
Protons and electrons
D.
Only protons
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ANSWER :
B. Protons and neutrons
2.
Particles inside the nucleus (protons and neutrons) are collectively called:
A.
Nucleons
B.
Quarks
C.
Isotopes
D.
Nuclides
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ANSWER :
A. Nucleons
3.
The atomic number (Z) of an element equals:
A.
The number of protons in the nucleus
B.
The total number of nucleons
C.
The number of electrons + neutrons
D.
The number of neutrons in the nucleus
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ANSWER :
A. The number of protons in the nucleus
4.
The mass number (A) of a nucleus equals:
A.
The total number of protons and neutrons
B.
The number of neutrons only
C.
The number of protons only
D.
The number of electrons
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ANSWER :
A. The total number of protons and neutrons
5.
The number of neutrons (N) in a nucleus is given by:
A.
N = A + Z
B.
N = A − Z
C.
N = Z − A
D.
N = A × Z
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ANSWER :
B. N = A − Z
6.
The notation á´¬_Z X represents a nuclide where:
A.
A is atomic number, Z is mass number
B.
A is the mass number, Z is the atomic number, X is the chemical symbol
C.
A is the radius of nucleus, Z is the charge
D.
A is the number of electrons, Z is the number of protons
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ANSWER :
B. A is the mass number, Z is the atomic number, X is the chemical symbol