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The curve of blinding energy per nucleon...

The curve of blinding energy per nucleon as a function of atomic mass number has a sharp peak for helium nucleus. This implies that helium.

A

Can easily be broken up

B

Is very stable

C

Can be used as fissionable material

D

Is radioactive

Text Solution

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The correct Answer is:
B
(b) The elements high on the `B.E.` versus mass number plot are very tightly bound and hence, are stable. And the elements those are lower on this plot, are less tightly bound, are unastable.
Since helium nucleus shows a peak on this plot so, it is very stable.
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A2Z-NUCLEAR PHYSICS-Section D - Chapter End Test
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  3. A radioactive sample at any instant has its disintegration rate 5000 d...

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  4. Which of the following atoms has the lowest ionization potential ?

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  5. In the nuclear fusion reaction (1)^(2)H + (1)^(3)H rarr (2)^(4)He + ...

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  6. The binding energy per nucleon of deuterium and helium atom is 1.1 MeV...

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  7. If radius of the (13)^(27) Al necleus is estimated to be 3.6 fermi the...

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  8. Starting with a sample of pure .^66 Cu, 7//8 of it decays into Zn in 1...

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  9. Some radioactive nucleus may emit.

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  10. Which of the following is a correct statement?

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  11. .^22 Ne nucleus after absorbing energy decays into two alpha-particles...

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  12. The half - life of I ^ (131) is 8 days. Given a sample of I^(131) at ...

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  13. The binding energy per nucleon of O^16 is 7.97 MeV and that of O^17 is...

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  14. A star initially has 10^40 deuterons. It produces energy via the proce...

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  15. A nucleus with mass number 220 initially at rest emits an alpha-partic...

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  16. The half life of radioactive Radon is 3.8 days . The time at the end o...

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  17. A freshly prepared radioactive source of half-life 2 h emits radiation...

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  18. A radioactive material decays by simulataneous emission of two particl...

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  19. The half-life period of a radioactive element x is same as the mean li...

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  20. Two radioactive X(1) and X(2) have decay constants 10 lambda and lamb...

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  21. After 280 days, the activity of a radioactive sample is 6000 dps. The ...

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