The alkali metals react with most non-metals to form hydrides, oxides, sulphides, carbides, phosphides and other compounds. The binary compounds of all alkali metals are ionic with M^(+) cations. The alkali metals easily ionize and readily reduce hydrogen ions. They react with ammonia to evolve hydrogen and form blue coloured solutions. 2M(s) + 2H_2O (l) to 2MOH(aq) + H_2(g) 2M(s) + 2NH_3 (l) to 2MNH_2(am) + H_2(g) Arrangethe following alkali metal ions in the decreasing order of their mobility in aqueous solutions: Li^(+), Na^(+),K^(+),Rb^(+)

The alkali metals react with most non-metals to form hydrides, oxides,

1.	The alkali metals react with most non-metals to form hydrides, oxides, sulphides, carbides, phosphides and other compounds. The binary compounds of all alkali metals are ionic with M^(+) cations. The alkali metals easily ionize and readily reduce hydrogen ions. They react with ammonia to evolve hydrogen and form blue coloured solutions. 2M(s) + 2H_2O (l) to 2MOH(aq) + H_2(g) 2M(s) + 2NH_3 (l) to 2MNH_2(am) + H_2(g) Arrangethe following alkali metal ions in the decreasing order of their mobility in aqueous solutions: Li^(+), Na^(+),K^(+),Rb^(+)
Answer» Solution :`Rb^(+) GT K^(+) gt NA^(+) gt LI^(+)`