If λ₁ and λ₂ are the wavelengths of the first members of the Lyman and Paschen
If λ₁ and λ₂ are the wavelengths of the first members of the Lyman and Paschen series respectively, then the…
7 years ago
Atoms and Nuclei
Two nuclei have their mass numbers into the ratio of 1:3
Two nuclei have their mass numbers into the ratio of 1:3. The ratio of their nucleus densities would be Options…
7 years ago
If M (A; Z), Mₚ and Mₙ denote the masses of the nucleus AZ X, proton
If M (A; Z), Mₚ and Mₙ denote the masses of the nucleus AZ X, proton and neutron respectively in…
7 years ago
If the nucleus ²⁷₁₃Al has nuclear radius of about 3.6 fm
If the nucleus ²⁷₁₃Al has nuclear radius of about 3.6 fm, then ¹²⁵₃₂Te would have its radius approximately as Options…
7 years ago
Fission of nuclei is possible because the binding energy per nucleon in them
Fission of nuclei is possible because the binding energy per nucleon in them Options (a) increases with mass number at…
7 years ago
In the reaction ₁²H+₁³H+₂⁴He+₀¹n, if the binding energies of ₁²H,₁³H and ₂⁴He
In the reaction ₁²H+₁³H+₂⁴He+₀¹n, if the binding energies of ₁²H,₁³H and ₂⁴He are respectively a,b and c (in MeV), then…
7 years ago
The Bohr model of atoms
The Bohr model of atoms Options (a) Assumes that the angular momentum of electrons is quantized (b) Uses Einstein's photoelectric…
7 years ago
If in a nuclear fusion process, the masses of the fusing nuclei be m₁ and m₂
If in a nuclear fusion process, the masses of the fusing nuclei be m₁ and m₂ and the mass of…
7 years ago
Complete the reaction: ₀n¹+ ₉₂U²³⁵→₅₆Ba¹⁴⁴+……..+3n
Complete the reaction: ₀n¹+ ₉₂U²³⁵→₅₆Ba¹⁴⁴+........+3n Options (a) ₃₆Kr⁸⁹ (b) ₃₆Kr⁹⁰ (c) ₃₆Kr⁹³ (d) ₃₆Kr⁹² Correct Answer: ₃₆Kr⁸⁹ Explanation: A' of…
7 years ago
If the ionisation energy for the hydrogen atom is 13.6 eV, the energy required
If the ionisation energy for the hydrogen atom is 13.6 eV, the energy required to excite it from the ground…
7 years ago