Question

( urgent help needed!! 50pts + brainliest )

What particle remains when uranium-238 undergoes alpha decay?

A. thorium-234
B. protactinium-234
C. plutonium-234
D. neptunium-234

Answer 1

Answer:

Thorium-234 option a .......

Answer 2

238 4 234

U --> α + Th

92 2 90

The answer is A Thorium.