10.1. What are the common physical and chemical features of alkali metals?
10.1. What are the common physical and chemical features of alkali metals?
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- Physical appearance: All the alkali metals are silvery white, soft and light metals.
- Density: Because of the large size, these elements have low density which increases down the group except for potassium which is lighter than sodium (most likely due to an unexpected increase in the atomic size.).
- The
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Li+ has the highest hydration enthalpy.
Hence it is most hydrated
Therefore, Correct order of hydrated radii is Cs+ < Rb+ < K+ < Na+ < Li+
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