1.

For alkali metals, which one of the following trends is incorrect

Answer»

Hydration energy : LigtNagtKgtRb
Ionization energy: LigtNagtKgtRb
Density:LiltNaltKltRb
ATOMIC size : LiltNaltKltRb

Solution :Density GRADUALLY INCREASES on moving down from Li to Cs. Potassium is , however,lighter than Sodium. The ABNORMAL value of potassiumis due to unusual increases in atomic size, i.e., atomic volume.


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