Question 11.27 In some of the reactions thallium resembles aluminium, whereas in others it resembles with group I metals. Support this statement by giving some evidences.
Class XI The p-Block Elements Page 325
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I have many evidence for it . below I am showing some important evidence :
Thallium and Aluminum both the elements belong to the ground 13 . hence, their general configuration for the valance shell is ns²np. Aluminum shows only +3 oxidation state . Like Al thallium also shows +3 oxidation state in some compounds like Tl2O3 , TlCl3 etc Like Aluminum , Thallium also form octahedral ions e.g.,[AlF6]³- and [TlF6]e- .
Like group- I Alkali metals, Thallium also shows the +1 oxidation state due to inert pair effect in some compounds like TlCl, T2O etc. like Alkali metal hydroxides, TlOH is water soluble and it's aqueous solution is strongly alkaline. Tl2SO4 also forms alum like alkali metal sulphates .
Tl2CO3 is soluble in water like alkali metal carbonates .
Thallium and Aluminum both the elements belong to the ground 13 . hence, their general configuration for the valance shell is ns²np. Aluminum shows only +3 oxidation state . Like Al thallium also shows +3 oxidation state in some compounds like Tl2O3 , TlCl3 etc Like Aluminum , Thallium also form octahedral ions e.g.,[AlF6]³- and [TlF6]e- .
Like group- I Alkali metals, Thallium also shows the +1 oxidation state due to inert pair effect in some compounds like TlCl, T2O etc. like Alkali metal hydroxides, TlOH is water soluble and it's aqueous solution is strongly alkaline. Tl2SO4 also forms alum like alkali metal sulphates .
Tl2CO3 is soluble in water like alkali metal carbonates .
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