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Mases of two isobars .(29)^(64) Cu and ....

Mases of two isobars `._(29)^(64) Cu` and `._(930)^(64)Zn` are `63.9298` amu and `63.9292` amu respectively. It can be concluded form these data that:

A

Both the isobars are stable

B

`.^(64)Zn` is radioactive, decaying to `.^(64)Cu` through `beta-` decay

C

`.^(64)Cu` is radioactive, decaying to `.^(64)Zn` through `gamma-` decay

D

`.^(64)Cu` is radioactive, decaying to `.^(64)Zn` throgh `beta-` decay

Text Solution

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The correct Answer is:
`(d)`
Atomnic mass of `Cu` is more than `Zn` and thus it should be unstable
`._(29)^(64)Cu rarr ._(30)^(64) Zn + ._(+1)e^(0)`
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Masses of two isobars ._(29)Cu^(64) and ._(30)Zn^(64) are 63.9298 u and 63.9292 u , respectively. It can be concluded from these data that .

If two molecules of A and B having mass 100 amu and 64 amu respectively and rate of diffusion of A is 12 xx 10^(-3) , then what will be the rate of diffusion of B?

The mass of nucleus ._(z)X^(A) is less than the sum of the masses of (A-Z) number of neutrons and Z number of protons in the nucleus. The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus. A heavy nucleus of mass M can break into two light nuclei of mass m_(1) and m_(2) only if (m_(1)+m_(2)) lt M . Also two light nuclei of massws m_(3) and m_(4) can undergo complete fusion and form a heavy nucleus of mass M ''only if (m_(3)+m_(4)) gt M ''. The masses of some neutral atoms are given in the table below. |{:(._(1)^(1)H,1.007825u,._(1)^(2)H,2.014102u,),(._(1)^(3)H,3.016050u,._(2)^(4)H,4.002603u,),(._(3)^(6)Li,6.015123u,._(3)^(7)Li,7.016004u,),(._(30)^(70)Zn,69.925325u,._(34)^(82)Se,81.916709u,),(._(64)^(152)Gd,151.91980u,._(82)^(206)Pb,205.97445u,),(._(83)^(209)Bi,208.980388u,._(84)^(210)Po,209.982876u,):}| The correct statement is

P BAHADUR-RADIO ACTIVITY-Exercies 3A
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  2. The equation: 4.(1)^(1) H^(+) rarr .(2)^(4) He^(2+) + 2e + 26MeV repre...

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  3. Mases of two isobars .(29)^(64) Cu and .(930)^(64)Zn are 63.9298 amu a...

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  4. The deacy time t for radioactive element proceeds to 4 half-lives. Th...

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  13. A radioactive species undergoes decay for time t where t = 4t(1//2) . ...

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  14. The half of a radioactive sample is 2n year. The fraction left undecye...

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  15. The density of a nucleus varies with the mass number A as:

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  16. .(1)^(3)H and .(2)^(4)He are:

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  17. The rate of decay of a radioactive species is given by R(1) at time t...

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  18. Two reactions having their energy of activation E(1) and E(2) tempera...

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  19. The activity fo a radioactive sample decrases t 1//3 of the orginal a...

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  20. The half line of a radioactive element is 2n year. The fraction decaye...

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