The reaction between sodium and water can be made less vigorous by

What are the common physical and chemical features of alkali metals?

The wire of a flash bulb is made of

Which of the following elements has the highest reaction rate with water?

Comment on each of the following observations:
$(a)$ The mobilities of the alkali metal ions in aqueous solution are
$Li^{+} < Na^{+} < K^{+} < Rb^{+} < Cs^{+}$
$(b)$ Lithium is the only alkali metal to form a nitride directly.
$(c)$ $E^{\circ}$ for $M^{2+}_{(aq)} + 2e^{-} \longrightarrow M_{(s)}$ (where $M = Ca, Sr$ or $Ba$) is nearly constant.

Metal-ammonia solutions of group $1$ and group $2$ metals differ in