Q18.How many alpha and beta particles are emitted when Uranium 92U238 decays to lead 82 Pb206 ? (1) 3 alpha particles and 5 beta particles (2) 6 alpha particles and 4 beta particles (3) 4 alpha particles and 5 beta particles (4) 8 alpha particles and 6 beta particles
What This Question Tests
This question tests the ability to balance nuclear equations for alpha and beta decays, applying the conservation laws for mass number and atomic number to find the number of emitted particles.
Concepts Tested
Formulas Used
A_parent = A_daughter + N_alpha * 4
Z_parent = Z_daughter + N_alpha * 2 - N_beta * 1
📚 NCERT Sections This Tests
13.2 — Obtain The Binding Energy Of The Nuclei 5626Fe And 20983 Bi In Units Of
Physics Class 12 · Chapter 13
13.2 Obtain the binding energy of the nuclei 5626Fe and 20983 Bi in units of MeV from the following data: m ( 5626Fe ) = 55.934939 u m ( 20983 Bi ) = 208.980388 u
13.5 — The Q Value Of A Nuclear Reaction A + B ® C + D Is Defined By
Physics Class 12 · Chapter 13
13.5 The Q value of a nuclear reaction A + b ® C + d is defined by Q = [ mA + mb – mC – md]c2 where the masses refer to the respective nuclei. Determine from the given data the Q-value of the following reactions and state whether the reactions are exothermic or endothermic. (i) 11 H+13 H →12 H+12 H (ii) 126 C+126 C →1020 Ne+ 24 He Atomic masses are given to be m ( 12 H ) = 2.014102 u m ( 13 H) = 3.016049 u m ( 126 C ) = 12.000000 u m ( 1020 Ne ) = 19.992439 u
13.4 — Obtain Approximately The Ratio Of The Nuclear Radii Of The Gold Isotope
Physics Class 12 · Chapter 13
13.4 Obtain approximately the ratio of the nuclear radii of the gold isotope 197 79 Au and the silver isotope 10747 Ag .
📋 Question Details
- Chapter
- Nuclei
- Topic
- Radioactive Decay
- Year
- 2022
- Shift
- 26 Jun Shift 1
- Q Number
- Q18
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 13: Nuclei
More from this Chapter
Q71.At a specific instant emission of radioactive compound is deflected in a magnetic field. The compound can emit (i) electrons (ii) protons (iii) He2+ (iv) neutrons The emission at instant can be (1) i, ii, iii (2) i, ii, iii, iv (3) iv (4) ii, iii
Q72.If N0 is the original mass of the substance of half- life period t1/2 = 5 years, then the amount of substance left after 15 years is (1) N0/8 (2) N0/16 (3) N0/2 (4) N0/4
Q73.If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should (1) increase (2) remain unchanged (3) decrease (4) first increase then decrease
Q82.In which of the folloiwng species the interatomic bond angle is 109∘28′? (1) NH3, (BF4)−1 (2) (NH4)+, BF3 (3) NH3, BF4 (4) (NH2)−1, BF3