Question

To what element does Thorium-230 (atomic number-90) decay when it emits an alpha particle (42He)? a. 22688Ra c. 22886Rn b. 23090Ra d. 22286Rn

Answer 1

Answer:

Option A

Explanation:

Thorium-230 decays to Radium-226 also emitting an $\alpha$  particle.

The reaction is as follows:

$^{230}Th$   =>   $^{226} Ra + ^{4} He$ (Alpha-particle)