Question

A nucleus of ₈₄PO²¹⁰ originally at rest emits a-particle with speed v. What will be the recoil speed of the daughter nucleus?

• A. 4v/206
• B. 4v/214
• C. v/206
• D. v/214

Answer 1

Answer: (A)

4v/206

Answer 2

206 × v' = 4 × v

v' = $\frac { 4 } { 206 }$v