What do you expect the nature of Hydrides is, if formed by elements of atomic numbers 15, 19, 23 and 44 with dihydrogen ? Compare their behaviour towards water.

What do you expect the nature of Hydrides is, if formed by elements of

1.	What do you expect the nature of Hydrides is, if formed by elements of atomic numbers 15, 19, 23 and 44 with dihydrogen ? Compare their behaviour towards water.
Answer» Solution :(i) The element (Z = 15) is a p-block element so it form covalent HYDRIDE eg. `PH_3` (ii) The element (Z = 19) is a s-block element so, it form ionic hydride e.g. KH (iii) The element (Z = 23) is d-block element. So it form nonstoichiometric hydride. e.g. `VH_(1.6)` (iv) The element (Z = 44) is from d-block and 8 GROUP. So it does not form hydride. Above four hydride, only `H_2` is obtained in reac tion of KH with `H_2O`. `KH + H_2O to KOH + H_2`