Quantum, Atomic, and Nuclear Physics
Which of the following fundamental forces is the weakest?
Strong Nuclear Force
Electromagnetic Force
Weak Nuclear Force
Gravitational Force
Which type of radiation is essentially a helium nucleus?
Alpha Particle
Beta Particle
Gamma Ray
X-ray
A radioactive substance has a half-life of 20 years. If you start with 4000 atoms, how many atoms will remain after 40 years?
500
1000
2000
3000
During alpha decay, a nucleus emits an alpha particle. If a nucleus of Uranium-238 (²³⁸U) undergoes alpha decay, what is the resulting daughter nucleus?
Thorium-234 (²³⁴Th)
Protactinium-234 (²³⁴Pa)
Neptunium-237 (²³⁷Np)
Plutonium-242 (²⁴²Pu)
According to Einstein's mass-energy equivalence, what is the relationship between energy and mass?
Energy is equal to mass.
Energy is equal to mass times the speed of light.
Energy is equal to mass times the speed of light squared.
Energy is equal to mass divided by the speed of light squared.
If a nuclear reaction has a mass defect of , what is the energy released (E) during the reaction?
In a nuclear reaction, the mass of the reactants is slightly greater than the mass of the products. What happens to the 'missing' mass?
It is converted into energy.
It is destroyed.
It is converted into momentum.
It is converted into heat.

How are we doing?
Give us your feedback and let us know how we can improve
A nuclear reaction releases 931.5 MeV of energy. What is the mass defect in atomic mass units (u), given that 1 u = 931.5 MeV/c²?
0.5 u
1 u
2 u
4 u
Which concept explains that particles can exhibit wave-like properties and waves can exhibit particle-like properties?
Quantum entanglement
Wave-particle duality
Superposition
Heisenberg uncertainty principle
What phenomenon is demonstrated by the double-slit experiment?
Radioactive decay
Photoelectric effect
Wave-particle duality
Nuclear fission