SATHEE: Atoms And Nuclei Question 401

Atoms And Nuclei Question 401

Question: Assume that a neutron breaks into a proton and an electron. The energy released during this process is: (mass of neutron $= 1.6725 \times 10^{- 27} k g,$ mass of proton $= 1.6725 \times 10^{- 27} k g,$ mass of electron $= 9 \times 10^{- 31} k g$ ).

Options:

A) $0.51 M e V$

B) $7.10 M e V$

C) $6.30 M e V$

D) $5.4 M e V$

Show Answer

Answer:

Correct Answer: A

Solution:

$_{0}^{1} n \to_{1}^{1} H +_{- 1} e^{0} + \bar{v} + Q$

The mass defect during the process $Δ m = m_{n} - m_{H} - m_{e} = 1.6725 \times 10^{- 27}$

$- (1.6725 \times 10^{- 27} + 9 \times 10^{- 31} k g)$

$= - 9 \times 10^{- 31} k g$

The energy released during the process $E = Δ m c^{2}$

$E = 9 \times 10^{- 31} \times 9 \times 10^{16} = 81 \times 10^{- 15}$ Joules

$E = \frac{81 \times 10^{- 15}}{1.6 \times 10^{- 19}} = 0.511 M e V$

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Atoms And Nuclei Question 401

Question: Assume that a neutron breaks into a proton and an electron. The energy released during this process is: (mass of neutron =1.6725×10−27kg, mass of proton =1.6725×10−27kg, mass of electron =9×10−31kg ).

Options:

Answer:

Solution:

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Question: Assume that a neutron breaks into a proton and an electron. The energy released during this process is: (mass of neutron $= 1.6725 \times 10^{- 27} k g,$ mass of proton $= 1.6725 \times 10^{- 27} k g,$ mass of electron $= 9 \times 10^{- 31} k g$ ).