All of the following elements of IA group form superoxide EXCEPT:
Correct answer: B. Na
- A. K
- B. Na
- C. Cs
- D. Rb
Explanation
Superoxide (O2-) is formed when an alkali metal donates an electron to an oxygen molecule. In this case, sodium (Na) does not form superoxide, making it the correct answer. Potassium (K), cesium (Cs), and rubidium (Rb) can form superoxide due to their electronic configuration and ionization energies, which allow them to donate electrons to oxygen. Therefore, options A, C, and D are incorrect.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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