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Which of the following Group 13 elements forms a stable +1 oxidation state?

Option: 1


Option: 2


Option: 3



Option: 4


Answers (1)


Indium is the only Group 13 element that forms a stable +1 oxidation state. This is because it has a valence electron configuration of4s^{2}3d^{10}4p^{1} , which allows it to lose one valence electron and form a stable +1 oxidation state. The other Group 13 elements, including boron, aluminium, and gallium, all form stable +3 oxidation states. Hence option 4 is the correct answer. 

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