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Alpha Decay

21. Nuclear Chemistry / Alpha Decay / Problem 3

What is the balanced nuclear equation when the isotope actinium-225 decays by alpha emission?

A

²²⁵₈₉Ac + ⁴₂He → ²²⁹₉₁Fr

B

²²⁵₈₉Ac → ²²¹₈₇Fr + ⁴₂He

C

²²⁵₈₉Ac → ²²⁹₉₁Pa + ⁴₂He

D

²²⁵₈₉Ac + ⁴₂He → ²²¹₈₇Ac

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