Question

When 238u92 becomes , 234Th90 what type of decay has taken place?

Question 6 options:

alpha

beta

gamma

positron

Answer 1

Answer: alpha

Explanation: Alpha particles are fast moving streams of positively charged particles that are shown to be Helium nuclei. They have a mass

number of 4 and an atomic number of 2 and a charge of +2. Alpha particles are represented as 4He2. When 238U92 becomes 234Th90, it emitted a helium nucleus 4He2. The equation for the decay is 238U92 ---> 234Th90 + 4He2.