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Byju's Answer
Standard XII
Chemistry
MP, BP and Density (Group 1)
Which of the ...
Question

Which of the following has the lowest melting point?


A

Li

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B

K

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C

Na

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D

Cs

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Solution

The physical and chemical properties of the alkali metals can be explained by their having an ns1 valence electronic configuration which results in weak metallic bonding. Hence all alkali metals are soft and have low melting point. Moving down the group this melting point decreases. Hence Cs has the least melting point.

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