Atoms and Nuclei

JEE Main Physics · 11 questions

All questions, latest first

• Two radioactive substances A and B of mass numbers 200 and 212 respectively, shows spontaneous α -decay with same Q value of 1…20268 April, Shift 2 · Q44
• The energy released if hydrogen atoms are combined to form _2^4 He is ____ MeV. (Take binding energies per nucleon of _1^2 H and…20266 April, Shift 2 · Q41
• The ratio of momentum of the photons of the 1^st and 2^nd line of Balmer series of Hydrogen atoms is α / β. The possible values…20266 April, Shift 1 · Q44
• The energy released when 7/17.13 kg of _3^7 Li is converted into _2^4 He by proton bombardment is α × 10^32 eV. The value of α is…20266 April, Shift 1 · Q48
• Assuming the experimental mass of _6^12 C as 12 u, the mass defect of _6^12 C atom is ____ MeV / c^2. (Mass of proton =1.00727 u.…20265 April, Shift 2 · Q44
• In the hydrogen atom, the electron makes a transition from the higher orbit (i) to a lower orbit (f). The ratio of the radius of…20265 April, Shift 1 · Q36
• In Rutherford's alpha-particle scattering experiment, only a few alpha particles rebound back because A. The size of gold nucleus…20264 April, Shift 2 · Q43
• Two nuclei of mass number 3 combine with another nucleus of mass number 4 to yield a nucleus of mass number 10. If the binding…20264 April, Shift 1 · Q29
• The binding energy per nucleon of _83^209 Bi is ____ MeV. [Take m(_83^209 Bi)=208.980388 u, m_p=1.007825 u, m_n=1.008665 u, 1…20262 April, Shift 2 · Q44
• Using Bohr's model, calculate the ratio of the magnetic fields generated due to the motion of the electrons in the 2^nd and 4^th…20262 April, Shift 2 · Q47
• Angular momentum of an electron in a hydrogen atom is (3 h)/(π), then the energy of the electron is ____ eV.20262 April, Shift 1 · Q44