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If the Nucleons of a Nucleus Are Separated from Each Other, the Total Mass is Increased. Where Does this Mass Come From? - Physics

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प्रश्न

If the nucleons of a nucleus are separated from each other, the total mass is increased. Where does this mass come from?

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उत्तर

When the nucleons of a nucleus are separated, a certain amount of energy is to be given to the nucleus, which is known as the binding energy.
Binding energy = [(Number of nucleons)  `xx` (Mass of a nucleon) - (Mass of the nucleus)]

 When the nucleons of a nucleus are separated, the increase in the total mass comes from the binding energy, which is given to the nucleus to break-off its constituent nucleons as energy is related to mass by the relation given below.
E = Δmc2

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पाठ 24: The Nucleus - Short Answers [पृष्ठ ४४०]

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एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
पाठ 24 The Nucleus
Short Answers | Q 7 | पृष्ठ ४४०

संबंधित प्रश्‍न

Is the nucleus formed in the decay of the nucleus `""_11^22Na`, an isotope or isobar?


The neutron separation energy is defined as the energy required to remove a neutron from the nucleus. Obtain the neutron separation energies of the nuclei `""_20^41"Ca"` and `""_13^27 "Al"` from the following data:

`"m"(""_20^40"Ca")` = 39.962591 u

`"m"(""_20^41"Ca")` = 40.962278 u

`"m"(""_13^26"Al")` = 25.986895 u

`"m"(""_13^27"Al")` = 26.981541 u


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`"m"(""_92^238"U")` = 238.05079 u

`"m"(""_58^140"Ce")` = 139.90543 u

`"m"(""_44^99"Ru")` = 98.90594 u


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(Use Mass of proton mp = 1.007276 u, Mass of `""_1^1"H"` atom = 1.007825 u, Mass of neutron mn = 1.008665 u, Mass of electron = 0.0005486 u ≈ 511 keV/c2,1 u = 931 MeV/c2.)


Which property of nuclear force explains the constancy of binding energy per nucleon `((BE)/A)` for nuclei in the range 20< A < 170 ?


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(i) The moderator
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(iii) The coolant


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Nuclei with magic no. of proton Z = 2, 8, 20, 28, 50, 52 and magic no. of neutrons N = 2, 8, 20, 28, 50, 82 and 126 are found to be very stable.

(i) Verify this by calculating the proton separation energy Sp for 120Sn (Z = 50) and 121Sb = (Z = 51).

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(ii) What does the existance of magic number indicate?


Define binding energy per nucleon.


What is binding energy of nucleus?


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