Question

Which of the following nuclear reactions is not possible?

• A. ${}_6^{12}{C+}_6^{12}C{⟶}_{10}^{20}{Ne+}_2^{4}He$
• B. ${}_4^9{Be+}_1^{1}H{⟶}_3^6{Li+}_2^{4}He$
• C. ${}_5^{11}{Be+}_1^{1}H{⟶}_4^9{Be+}_2^{4}He$
• D. ${}_3^7{Li+}_2^{4}He{⟶}_1^1{H+}_4^{10}B$

Answer 1

Answer: (C)

${}_5^{11}{Be+}_1^{1}H{⟶}_4^9{Be+}_2^{4}He$

The following laws hold true in any reaction
1) Conservation of mass (nucleons)
2) conservation of charge
Checking for all the reactions
$\Sigma A_{products}=\Sigma A_{reactants}$
For option C: $9+4\ne 11+1$
Hence, option (c) not possible.