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.



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