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

Option A

Step-by-step 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)