- [Medium]Using Rydberg formula, what is the wavelength of light emitted when an electron in hydrogen atom transitions from n = 3 to n = 2? (R = 1.097 × 10⁷ m⁻¹...
- [Medium]In a nuclear fission reaction, if the binding energy per nucleon increases from 7.6 MeV to 8.5 MeV, and 200 nucleons are involved, what is the energy ...
- [Easy]The wavelength of the first line of Balmer series in hydrogen spectrum is 656 nm. This transition is from n = 3 to:...
- [Easy]The decay constant of a radioactive substance is 0.693 per day. What is its half-life?...
- [Easy]In Rutherford's α-particle scattering experiment, most alpha particles pass through the gold foil undeflected because:...
- [Easy]The half-life of a radioactive substance is 10 days. What fraction of the original amount will remain after 30 days?...
- [Easy]Two isotopes of an element differ in:...
- [Easy]In the nuclear reaction ²³⁸₉₂U → ²³⁴₉₀Th + X, what is X?...
- [Easy]In which orbit of hydrogen atom does the electron have an energy of -3.4 eV?...
- [Hard]Energy released in nuclear reaction given mass defect Δm is:...
- [Medium]Half-life T_{1/2} relates to decay constant by:...
- [Easy]Ionization energy corresponds to energy required to move electron from ground state to:...
- [Easy]Balmer series of hydrogen arises from transitions ending at:...
- [Easy]Nucleons in nucleus refer to:...
- [Hard]Alpha decay reduces mass number by:...
- [Medium]Mass defect arises because total mass of nucleus is:...
- [Easy]Energy of nth Bohr orbit in hydrogen-like ion (atomic number Z) scales as:...
- [Hard]In beta minus decay, atomic number Z changes by:...
- [Easy]Bohr radius a_0 for hydrogen represents:...
- [Hard]Activity A of sample defined as:...
- [Hard]Gamma emission typically follows nuclear reaction to:...
- [Hard]Nuclear force is characterized by being:...
- [Medium]Radioactive decay law states N(t) = N_0 e^{-λ t} where λ is:...
- [Medium]High binding energy per nucleon implies nucleus is:...