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Write the order of thermal stability of the hydrides of Group 16 elements.

7.14      Write the order of thermal stability of the hydrides of Group 16 elements.

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Hydrides of group 16 elements become less thermally stable as we go down the group, i.e., H_2O> H_2S> H_2Se> H_2Te> H_2Po. This is due to M-H bond dissociation energy decreases down the group as we increase in the size of the atom. 

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