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#+3 oxidation state

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Modern Periodic Law and Present Form - Long Form Periodic Table

Which element in group 15 has the highest tendency to form stable compounds in the +3 oxidation state?

The +3 oxidation state becomes more stable down group 15 due to the inert pair effect. Bi forms stable BiCl₃ (+3), more so than N, P, or As, where +5 is also common.

Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Modern Periodic Law and Present Form - Long Form Periodic Table

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