Which of the following alkali metal is having least melting point ?

1.	Which of the following alkali metal is having least melting point ?
Answer» Na K Rb Cs. Solution :As the size of the metal INCREASES , the strength of metallic bonding decreases and hence its MELTING point decreases . Since the size of Cs is the biggest , therefore , its melting point is the lowest .THUS , OPTION (d) is correct .

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