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.