
To find:
the atom most likely to have unpaired electrons in each species: (a) NO2 (b) CNO (c) ClO2 (d) HO2

Answer to Problem 4.142QA
Solution:
Sr. no. | Species | Atom have unpaired electron |
(a) | NO2 | N |
(b) | CNO | C |
(c) | ClO2 | Cl |
(d) | HO2 | O |
Explanation of Solution
The number of valence electrons are distributed in such a way that octet of most electronegative atom in each species will be satisfied. Thus the least electronegative atom will get unpaired electron.
(a) NO2:
As Oxygen is more electronegative than Sulfur. Both oxygen takes6 electrons to complete, thus 5 electrons remained with Sulfur. They are distributed as 2 paired and 1 unpaired electron.
(b) CNO:
As Oxygen is more electronegative than Nitrogen and Carbon. Oxygen and nitrogen take electrons to complete octet. Therefore, unpaired electrons go to carbon.
(c) ClO2:
As Oxygen is more electronegative than Chlorine. Each Oxygen takes 6 electrons to complete octet, thus 3 electrons remained with Carbon. They are distributed as 1 paired and 1 unpaired electron.
(d) HO2:
Hydrogen and one oxygen atom tend to complete its octet, therefore, unpaired electron goes with another Oxygen atom.
Conclusion:
Sr.no. | Species | Atom have unpaired electron |
(a) | NO2 | N |
(b) | CNO | C |
(c) | ClO2 | Cl |
(d) | HO2 | O |
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