A nuclear transformation is written as X + ¹₀n → ⁷₃Li + ⁴₂He. Which nucleus is X?
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Question

A nuclear transformation is written as X + ¹₀n → ⁷₃Li + ⁴₂He. Which nucleus is X?

G1 Physics · Accepted Answer

Conserve mass number A and atomic number Z. A: Aₓ + 1 = 7 + 4 = 11, so Aₓ = 10. Z: Zₓ + 0 = 3 + 2 = 5, so Zₓ = 5. Therefore X = ¹⁰₅B. Correct answer: B.