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Chemical properties

Which is the correct thermal stability order for H2E(E=O,S, Se, Te and Po)? 


The thermal stability of hydrides decreases from H2O to H2Po. This is because as the size of atom E in H2E increases, the bond H-E becomes weaker and thus breaks easily on heating. Therefore the correct order of thermal stability is H2Po<H2Te<H2Se<H2 S<H2O

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