Atoms and Nuclei — practice questions
60 curated practice questions from Atoms and Nuclei (Physics NEET, NTA Exams) — 25 easy, 14 hard, 21 medium. Every question includes the final answer free; step-by-step worked solutions with a free account.
- Consider the spectral line resulting from the transition n = 2 → n = 1 in the atoms and ions given below. The shortest…
- When 3 Li 7 nuclei are bombarded by protons, resultant nuclei are 4 Be 8 , the emitted particles will be
- The half-life of a radioactive isotope is 3 h. If the initial mass of the isotope were 256 g, the mass of it remaining…
- A hypothetical radioactive nucleus decays according to the following series _ 72 ~A ^ 1!B ~A _ 1 ^ a^ - A _ 2 ~A _ 3 ~A…
- A photon of energy 10.2 eV collides inelastically with a hydrogen atom in ground state. After a few microseconds…
- Order of magnitude of density of Uranium nucleus is ( m _ p =1.67 10^ -27 ~kg )
- Two radioactive materials A and B have decay constants 20λ and 5λ respectively. If initially they have the same number…
- The first use of quantum theory to explain the structure of an atom was made by:
- The amount of energy released when one micro-gram of matter is annihilated is
- The 'rad' is the correct unit used to report the measurement of
- An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates…
- The binding energy per nucleon of deuterium [ _ 1 ^ 2 H ] and helium nucleus [ _ 2 ^ 4 He ] is 1.1 MeV and 7 MeV…
- A radioactive isotope decays at such a rate that after 192 minutes only 1/16 of the original amount remains. The…
- The number of α-particles and β-particles respectively emitted in the reaction AA ^ Al 16 7 ~B ^ B ^ 164 are
- A heavy nucleus of mass M _ X decays into two nuclei (Y and Z) of masses M_ y and M_ z The Q value of the reaction is
- In the nuclear reaction _ 1 H ^ 2 + _ 1 H ^ 2 _ 2 He ^ 3 + _ n ^ 1 Mass of deuterium atom = 2.014741 amu, Mass of 2 He…
- The equation: 4 _ 1 ^ 1 H _ 2 ^ 4 He +2 e ^ - +26 MeV represents
- If 13.6 eV energy is required to ionize the hydrogen atom, then the energy required to remove an electron from n = 2 is
- The radioisotope, tritium [ _ 1 ^ 3 H ] has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how…
- The stable nucleus that has a radius half that of Fe 56 is
- The ratio of the nuclear radii of elements with mass numbers 216 and 125 is
- Presence of gills in the tadpole of frog indicate that:
- Li nucleus has three protons and four neutrons. Mass of lithium nucleus is 7.016005 a.m.u. Mass of proton is 1.007277…
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- Let T 1 and T 2 be the energy of an electron in the first and second excited states of hydrogen atom, respectively…
- Radioactive material 'A' has decay constant '8 ' and material 'B' has decay constant ' '. Initially they have same…
- The half life of radioactive sample undergoing α-decay is 1.4 10^ 17 5 . If the number of nuclei in the sample is 2.0…
- If the ionisation potential of the hydrogen atom is 13.6 eV, then what will be the longest wavelength needed to remove…
- Assertion: During the nuclear process mass gets converted into energy. Reason: Einstein’s mass energy equation E = mc 2…
- A particle having almost zero mass and exactly zero charge is:
- The ratio of minimum wavelengths of Lyman and Balmer series will be
- The energy of second Bohr orbit of the hydrogen atom is -328 kJ mol -1 . Hence the energy of fourth Bohr orbit would be:
- m p and m n are masses of proton and neutron respectively. An element of mass M has Z protons and N neutrons then:
- A hydrogen atom and a Li 2 + ion both are in the second excited state. If L H and L Li are their respective electronic…
- The half-life of 131 I is 8 days. Given a sample of 131 I at time t = 0, we can assert that
- Which state of triply ionised beryllium has the same orbital radius as that of ground state of hydrogen atom?
- If in a nuclear fusion process, the masses of the fusing nuclei be m 1 and m 2 and the mass of the resultant nucleus be…
- If m, m n and m p are the masses of Z X A nucleus, the neutron and the proton respectively. Then
- For an electron in the second orbit of Bohr's hydrogen atom, the moment of linear momentum is:
- In the nuclear decay given below _ Z ^ A X _ Z+1 ^ A Y _ Z-1 ^ A-4 B^ * _ Z-1 ^ A-4 B the particles emitted in the…
- The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to . The…
- If M 0 is the mass of an oxygen isotope _ n 0^ 17 , M _ p and M _ n are the masses of a proton and a neutron…
- Given a sample of Radium-226 having half life of a 4 days. Find the probability, a nucleus disintegrates after 2 half…
- A nucleus disintegrates into two nuclear parts which have their velocities in the ratio of 2:1. The ratio of their…
- A radioactive element forms its own isotope after 3 consecutive disintegration. The particles emitted are
- Energy E of a hydrogen atom with principal quantum number n is given E= -13.6 n^ 2 eV . The energy of a photon ejected…
- Minimum energy required to take out only one electron from ground state of He + is:
- Binding energy of the atoms of elements X and Y are E X and E Y respectively. Three atoms of element Y fuse to give one…
- The atomic number and the mass number of an atom remains unchanged when it emits:
- As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li…
- A nucleus ruptures into two nuclear parts which have their velocity-ratio as 2 : 1. The ratio of their nuclear sizes…
- In the reaction _ 1 ^ 2 H + _ 1 ^ 3 H _ 2 ^ 4 He + 1 6 n , if the binding energies of _ 1 ^ 2 H , _ 1 ^ 3 H and _ 2 ^ 4…
- Which of the following is not conserved in nuclear reaction ?
- In a reactor, 2 kg of 92 U 235 fuel is fully used up in 30 days. The energy released per fission is 200 MeV. Given that…
- The half-life of a radio-isotope is four hours. If the initial mass of the isotope was 200 g, the mass remaining after…
- The nuclear reaction _ 1 H ^ 2 + _ 1 H ^ 2 _ 2 He ^ 4 (mass of deuteron =2.0141 a.m.u. and mass of helium =4.0024…
- Which of the following radiations have the least wavelength?
- In the nuclear fusion reaction _ 1 H ^ 2 + _ 1 H ^ 3 _ 2 He ^ 4 + n , the repulsive potential energy between the two…
- If radius of the _ 13 ^ 27 ~A nucleus is estimated to be 3.6 Fermi, then the radius of _ 52 ^ 125 Te nucleus be nearly
- The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom is