Elements with atomic number 17 and 20 from compounds with hydrogen. Write the formulae of the two compounds and compare their chemical behaviour in water.

Elements with atomic number 17 and 20 from compounds with hydrogen. Wr

1.	Elements with atomic number 17 and 20 from compounds with hydrogen. Write the formulae of the two compounds and compare their chemical behaviour in water.
Answer» Solution :The elements with ATOMIC number 17 and 20 are CHLORINE and calcium. Their corresponding hydrids are HCl and `CaH_(2)`. While HCl dissociates in WATER to give acidic solution. `CaH_(2)` reacts with water to evolve hydrogen GAS and the resulting solution is basic in nature. `HCl overset(aq)to H^(+)(aq)+Cl^(-)(aq)` `CaH_(2)+2H_(2)O to Ca(OH)_(2)+H_(2)`.