why thallium^-1 show + 1 Oxidation State.
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Thallium has the chemical symbol Tl and atomic number 81. It has the electron configuration [Xe] 2s22p1 and has a +3 or +1 oxidation state. As stated above, because thallium is heavy, it has a greater stability in the +1 oxidation state (inert pair effect). ... Thallium is soft and malleable.
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