Free Composition of Atomic Nuclei MCQs with Answers

• A. Negligible
• B. Same
• C. Greater
• D. Smaller

Explanation: The sum of the masses of the constituent nucleons (protons and neutrons) is actually greater than the mass of the resultant nucleus.

• A. 8 MeV per nucleon
• B. 7 MeV per nucleon
• C. 6 MeV per nucleon
• D. 9 MeV per nucleon

Explanation: The reason why the binding energy per nucleon peaks at around 8.75 MeV for Fe-56 is because Fe-56 has the optimal ratio of protons to…

• A. 50 - 60
• B. 100-150
• C. 150 - 200
• D. 200-235

Explanation: The nuclei have maximum binding energy per nucleon whose mass number lies between 50 and 60.

• A. Photons
• B. Leptons
• C. Mesons
• D. Baryons

Explanation: Baryons are also composite particles and include protons and neutrons. They consist of three quarks (or three antiquarks).

• A. Alpha particle.
• B. Beta particle.
• C. Neutron.
• D. Proton.

Explanation: The nuclear reaction involves two deuterium nuclei (1H2) fusing to form a helium-3 nucleus (2He3) and a neutron.

• A. Magnetic force
• B. Gravitational force
• C. Weak nuclear force
• D. Strong nuclear force

Explanation: The correct answer is the strong nuclear force. It is the strongest of the four fundamental forces and acts between nucleons (protons and…

• A. 10-12 m
• B. 10-20 m
• C. 10-10 m
• D. 10-15 m

Explanation: a) 10^-12 m:This option suggests that the diameter of a nucleus is 10^-12 meters.

• A. 1 and 2 only
• B. 1, 2 and 3 only
• C. 2 and 3 only
• D. 1 only

Explanation: The explanation for this question will be added soon.

• A. 0
• B. 1
• C. 2
• D. 3

Explanation: Electrons are leptons and leptons are not composed of quarks.

• A. Protium
• B. Deuterium
• C. Tritium
• D. All of these have same momentum

Explanation: Tritium has one proton and two neutrons in its nucleus. It is the heaviest isotope of hydrogen, and hence, has the highest momentum, given…

• A. 1.2 fm
• B. 2.4 fm
• C. 3.6 fm
• D. 4.8 fm

Explanation: Explanation is given below. Nuclear radius, R = RoA1/3 where Ro is a constant and A is the mass number So, r Al/r Cu = A Al^⅓/ACu⅓ =…

• A. Fission
• B. Fussion
• C. Both a and b
• D. None of these

Explanation: Fission & Fusion both reactions are examples of renewable sources of energy.

• A. An alpha particle
• B. Proton
• C. A positive helium ion
• D. A negative helium ion

Explanation: Helium's atomic number is 2 which means a neutral helium atom has 2 protons and 2 electrons , when helium loses an electron it has 1…

• A. Sn
• B. Ba
• C. Kr
• D. Fe

Explanation: Binding energy is the energy required to bind the nucleons inside the nucleus. Binding energy is the measure of stability.

• A. Electrons.
• B. Muons.
• C. Neutrinos.
• D. Neutrons.

Explanation: Strong nuclear force is experienced by particles in the nucleus, it is the attractive force that holds the nucleus together.

• A. One up quark and two down quarks.
• B. Up quarks and two down quarks.
• C. Two up quarks and one down quark.
• D. One up quark and one down quark.

Explanation: The sum of the relative masses of one up quark and two down quarks is equal to the mass of a neutron and the overall charge by adding the…

• A. Radioactive
• B. Fission
• C. Ionization
• D. Fusion

Explanation: The correct answer is D) Fusion. Laser technology can be used in fusion reactions, such as in inertial confinement fusion, where lasers…

• A. 4.48 MeV
• B. 4.84 MeV
• C. 3 x 10^2 MeV
• D. 4.84 eV

Explanation: Mass defect multiplied by square of speed is equal to the energy (E). You are given themass defect and you know the speed of light so just…

• A. An alpha-particle
• B. An electron
• C. A neutron
• D. A proton

Explanation: Without going into deep discussions An easy way to solve such questions, is to balance charge(atomic number) and mass on both sides For…

• A. 931 KeV
• B. 931 MeV
• C. 39 MeV
• D. 139 KeV

Explanation: The correct answer is Option B: 931 MeV. By utilizing the mass-energy equivalence formula E=mc^2, we calculate that 1 atomic mass unit…