Question

The alkali metals are low melting . Which of the following alkali metals is expected to melt if the room temperature rises to $30^{o}C$?

• A. Na
• B. K
• C. Rb
• D. Cs

Answer 1

Answer: (D)

Cs

Answer 2

: Atomic size increases down the group from Na to Cs so, the strength of metallic bonding decreases and hence, the melting point also decreases.