Which one of the following does not have +7 oxidation ....
Correct answer: A. F
- A. F
- B. Cl
- C. Br
- D. I
Explanation
Fluorine is unique among the halogens as it is the most electronegative element, and it only forms compounds where it can achieve a -1 oxidation state. This is due to its high electronegativity and small atomic size, which makes it unfavorable to lose electrons to achieve a positive oxidation state.In contrast, chlorine, bromine, and iodine can all exhibit a +7 oxidation state in certain compounds. Chlorine does this in perchlorates, bromine in bromates, and iodine in periodates.
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Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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