Interpretation:
The data given has to be assessed in terms of Harpoon mechanism.

Explanation of Solution
Given information:
Ionization energy values of alkali metals is given as,
Experimental reactive cross-section given as,
According to the Harpoon mechanism, the charge transfer is determined as,
Where,
Total reaction cross section can be given as,
Considering sodium and chlorine atom,
Value of
Total cross-section can be calculated as,
Considering potassium and chlorine atom,
Value of
Total cross-section can be calculated as,
Considering rubidium and chlorine atom,
Value of
Total cross-section can be calculated as,
Considering cesium and chlorine atom,
Value of
Total cross-section can be calculated as,
Considering sodium and bromine atom,
Value of
Total cross-section can be calculated as,
Considering potassium and bromine atom,
Value of
Total cross-section can be calculated as,
Considering rubidium and bromine atom,
Value of
Total cross-section can be calculated as,
Considering cesium and bromine atom,
Value of
Total cross-section can be calculated as,
Considering sodium and iodine atom,
Value of
Total cross-section can be calculated as,
Considering potassium and iodine atom,
Value of
Total cross-section can be calculated as,
Considering rubidium and iodine atom,
Value of
Total cross-section can be calculated as,
Considering cesium and iodine atom,
Value of
Total cross-section can be calculated as,
Table can be constructed from the obtained values as shown below,
The calculated values are not same as that of the experimental values that is given in the problem statement. But the trends in the values are similar to that of the experimental values.
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Chapter 18 Solutions
ATKINS' PHYSICAL CHEMISTRY
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