Atoms And Nuclei Question 175
Question: The mass of an a-particle is [CBSE PMT 1992]
Options:
A) Less than the sum of masses of two protons and two neutrons
B) Equal to mass of four protons
C) Equal to mass of four neutrons .
D) Equal to sum of masses of two protons and two neutrons
Show Answer
Answer:
Correct Answer: A
Solution:
This is due to mass defect because a part of mass is used in keeping the neutrons and protons bound as $ \alpha - $ particle.
