chemistry

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2 questions please:

The highest positive oxidation number that chlorine can exhibit an any compound is +7, whereas its most negative oxidation number is -1. Write the electron configuration of chlorine and explain why these are limiting oxidation numbers for chlorine.

Indicate whether the following species could possibly function as reducing agents:
a. Mg 2+
b. Ca
c. H2
Explain your reasoning.

Thank you in advance

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