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Asked in CBSE AIPMT 2001 · Q-value, decay and conservation laws
The notation X(n,α)Li means X absorbs a neutron and emits an α-particle.
Written in full: ^A_ZX + ¹₀n → ⁷₃Li + ⁴₂He.
Balance the mass numbers: A+1=7+4, so A=10.
Balance the atomic numbers: Z+0=3+2, so Z=5.
Z=5 is boron, so X is ¹⁰₅B.
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