MDCAT Physics MCQ #2833

A nucleus of Uranium-238 undergoes alpha decay. What is the mass number of the resulting nucleus?

MDCAT Physics MCQ #2833

  1. Question 1

    Q1. A nucleus of Uranium-238 undergoes alpha decay. What is the mass number of the resulting nucleus?

    • A) 234
    • B) 236
    • C) 238
    • D) 240

    Answer: 234

    Explanation: Alpha decay reduces mass number by 4. Resulting nucleus has mass number 238 - 4 = 234. Option 'B' incorrectly adds 2 protons.