Q29.Let Nβ be the number of β particle emitted by 1 gram of Na24 radioactive nuclei having a half life of 15 h. In 7. 5 h, the number Nβ is close to [NA = 6 .023 ×1023 mole−1] (1) 1.75 × 1022 (2) 6.2 × 1021 (3) 7.5 × 1021 (4) 1.25 × 1022
What This Question Tests
This problem involves calculating the number of undecayed atoms after a certain time using the half-life and then relating it to the number of emitted beta particles by finding the difference from the initial number of atoms.
Concepts Tested
Formulas Used
N = N₀ (1/2)^(t/T₁/₂)
Number of moles = mass/molar mass
Number of atoms = moles * N_A
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📋 Question Details
- Chapter
- Nuclei
- Topic
- Radioactive Decay and Half-Life
- Year
- 2015
- Shift
- 11 Apr Online
- Q Number
- Q29
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 13: Nuclei
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