Question

If an atom of thorium-234 were to undergo beta emission twice, which atom would result?


Rn-226


U-234


Th-230


U-238

Answer 1

Answer:

The answer to your question is  U-234

Explanation:

Data

Thorium-234

beta emission twice

Definition

Beta emission is when a beta particle (electron) is emitted from an atomic nucleus.

First beta emission

                                            ²³⁴₉₀Th   ⇒    ²³⁴₉₁Pa + e⁻

Second beta emission

                                            ²³⁴₉₁ Pa   ⇒  ²³⁴₉₂U  + e⁻

The atom will be Uranium-324

Answer 2

Answer: U-234

Explanation: no matter how much of beta decay, the mass number of the resulting element is unchanged