Verified Solution • 2025–26 Session moderate

QPage 440: Q9: HC Verma: Concepts of Physics - Volume 2 The Nucleus Page 440: Q9 Solution: When a boron nucleus ) is bombarded by a neutron, an -particle…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often incorrectly assume the mass number remains 10 or subtract the alpha particle mass from the original target mass (10 - 4 = 6), ignoring that the incident neutron adds 1 to the total mass number. Always sum the mass numbers of all reactants ($10 + 1 = 11$) before balancing the products.

When a boron nucleus 510B^{10}_5\text{B}) is bombarded by a neutron, an α\alpha-particle is emitted. Which nucleus will be formed as a result?

Step-by-Step Verified Solution

**Answer:** The resulting nucleus is _Li (lithium-7). **Step-by-Step Explanation:** The reaction is: __B + _n _ _Li + _He. Conservation of charge (atomic number): 5 + 0 = 3 + 2 = 5 _. Conservation of mass number: 10 + 1 = 7 + 4 = 11 _. Hence, the resulting nucleus is _Li (lithium-7)[citation:4].

All Questions in this Chapter

QPage 440: Q1 QPage 440: Q2 QPage 440: Q3 QPage 440: Q4 QPage 440: Q5 QPage 440: Q6 QPage 440: Q7 QPage 440: Q8 QPage 440: Q9 QPage 440: Q10 QPage 440: Q11 QPage 440: Q12 QPages 440-441: Q1 QPages 440-441: Q2 QPages 440-441: Q3 QPages 440-441: Q4 QPages 440-441: Q5 QPages 440-441: Q6 QPages 440-441: Q7 QPages 440-441: Q8 QPages 440-441: Q9 QPages 440-441: Q10 QPages 440-441: Q11 QPages 440-441: Q12 QPages 440-441: Q13 QPages 440-441: Q14 QPages 440-441: Q15 QPages 440-441: Q16 QPages 440-441: Q17 QPages 440-441: Q18 QPages 440-441: Q19 QPages 441-442: Q1 QPages 441-442: Q2 QPages 441-442: Q3 QPages 441-442: Q4 QPages 441-442: Q5 QPages 441-442: Q6 QPages 441-442: Q7 QPages 441-442: Q8 QPages 441-442: Q9 QPages 441-442: Q10 QPages 442-444: Q1 QPages 442-444: Q2 QPages 442-444: Q3 QPages 442-444: Q4 QPages 442-444: Q5 QPages 442-444: Q6 QPages 442-444: Q7 QPages 442-444: Q8 QPages 442-444: Q9 QPages 442-444: Q10 QPages 442-444: Q11 QPages 442-444: Q12 QPages 442-444: Q13 QPages 442-444: Q14 QPages 442-444: Q15 QPages 442-444: Q16 QPages 442-444: Q17 QPages 442-444: Q18 QPages 442-444: Q19 QPages 442-444: Q20 QPages 442-444: Q21 QPages 442-444: Q22 QPages 442-444: Q23 QPages 442-444: Q24 QPages 442-444: Q25 QPages 442-444: Q26 QPages 442-444: Q27 QPages 442-444: Q28 QPages 442-444: Q29 QPages 442-444: Q30 QPages 442-444: Q31 QPages 442-444: Q32 QPages 442-444: Q33 QPages 442-444: Q34 QPages 442-444: Q35 QPages 442-444: Q36 QPages 442-444: Q37 QPages 442-444: Q38 QPages 442-444: Q39 QPages 442-444: Q40 QPages 442-444: Q41 QPages 442-444: Q42 QPages 442-444: Q43 QPages 442-444: Q44 QPages 442-444: Q45 QPages 442-444: Q46 QPages 442-444: Q47 QPages 442-444: Q48 QPages 442-444: Q49 QPages 442-444: Q50 QPages 442-444: Q51 QPages 442-444: Q52 QPages 442-444: Q53

Related Learning Resources & Exam Preparation

Chapter Practice Bank
Practice all topic-wise questions from The Nucleus
Reference Textbook Solutions
Explore complete chapter exercises for HC Verma: Concepts of Physics - Volume 2
Competitive PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring