The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?
The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?
(i) Na
(ii) K
(iii) Rb
(iv) Cs
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(iv) Among alkali metals, melting point decreases as the strength of metallic bonding decreases with increasing size of the atom. Thus, Cs has the lowest melting point (28.5°C) and will melt at 30°C.
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