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Q12Q

Expert-verifiedFound in: Page 1331

Book edition
10th Edition

Author(s)
David Halliday

Pages
1328 pages

ISBN
9781118230718

**Pick the most likely member of each pair to be one of the initial fragments formed by a fission event: **

**(a) ${}^{{\mathbf{93}}}{\mathbf{Sr}}$ or ${}^{{\mathbf{93}}}{\mathbf{Ru}}$ **

**(b) ${}^{{\mathbf{140}}}{\mathbf{Gd}}$ or ${}^{{\mathbf{140}}}{\mathbf{I}}$ , **

**(c) ${}^{{\mathbf{155}}}{\mathbf{Nd}}$ or ${}^{{\mathbf{155}}}{\mathbf{Lu}}$ . **

**(Hint: See Fig. 42-5 and the periodic table, and consider the neutron abundance.)**

(a) The ranking for possibilities of nuclei fragments in a fission reaction is ${}^{93}\mathrm{Ru}$ .

(b) The ranking for possibilities of nuclei fragments in a fission reaction is ${}^{140}\mathrm{Gd}$

(c) The ranking for possibilities of nuclei fragments in a fission reaction is ${}^{155}\mathrm{Nd}$ .

**The ratio of the proton to neutron decides the stability of nuclei. This ratio gives the slope of figure 42-5.**

** Figure: 42-5**

**The higher the slope of the figure, most likely is the possibility of initial fragments in fission.**

**(a)**

The proton to neutron ratio is more for Ru than Sr, so the strontium is most likely in the fission.

Therefore, the ranking for possibilities of nuclei fragments in a fission reaction is ${}^{93}\mathrm{Ru}$ .

**(b)**

The proton to neutron ratio is more for Gd than I, so the Gd is most likely in the fission.

Therefore, the ranking for possibilities of nuclei fragments in a fission reaction is ${}^{140}\mathrm{Gd}$ .

**(c)**

The proton to neutron ratio is more for Lu than Nd, so the Lu is most likely in the fission.

Therefore, the ranking for possibilities of nuclei fragments in a fission reaction is ${}^{155}\mathrm{Nd}$ .

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