Which among `Na,K,Cs` and `Li` forms most stable hydride?

Answer the following: a. Which of the following has density greater than water ? Li, Na, K, Cs . b. Arrange K, Li, Rb in other of increasing electrode potential. c. Arrange Na, Li, K and Cs in increasing order of metallic bond. d. Which among Na, K, Cs and Li forms stable hydride ? e. On reacting eith oxygen, potassium can form K_(2)O , KO_(2) and K_(2)O_(2) . Is it correct ? f. Give the name of the hardest alakli metal. g. Arrange the following in order orf increasing polarising albility. Li^(o+), Na^(o+), K^(o+), Cs^(o+) h. Mention some of the properties of alkali metals which increse down the group. i. Mention some of the properties of alkali metals which decrease down the group.

The most stable hydride is

The most stable hydride is

The most stable hydride is

The most stable hydride is

Which among Na,K,Pb and Li has the lowest melting point?

Which among Na,K,Pb and Li has the lowest melting point?

Which one among Na & Na^+ is more stable and why?

Which hydride is most stable ?