question_answer 1)

The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to\[30{}^\circ C\]? (a)\[Na\]                                             (b) \[K\]                                               (c) \[Rb\]                                             (d) \[Cs\]

Answer:

(d) Caesium has the lowest melting point\[\left( 28.5{}^\circ C \right)\].