Which of the following metal has the highest melting point

  • Option 1)

    Li

  • Option 2)

    Na

  • Option 3)

    K

  • Option 4)

    Cs

 

Answers (1)

As we learnt in 

Physical properties of alkali metals -

1. Silvery white

2. Soft in nature, can be cut with knife except Li

3. Highly reactive, kept in solution to prevent reaction with air

-

 

 As charge density decreases down the group of Alkali metals, the strength of the metallic bond also falls, thus, lowering the melting points. 

Therefore, Li has highest melting point. 

 


Option 1)

Li

This option is correct

Option 2)

Na

This option is incorrect

Option 3)

K

This option is incorrect

Option 4)

Cs

This option is incorrect

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