Which one of the following alkali metals gives hydrated salts?

Options

A. Li
B. Na
C. K
D. Cs

Explanation

To determine which alkali metal gives hydrated salts, we need to analyze the properties of alkali metals and their ability to form hydrated salts.

### Step-by-Step Solution:

1. **Identify the Alkali Metals**: The alkali metals are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

2. **Understand Hydrated Salts**: Hydrated salts are compounds that contain water molecules within their crystalline structure. The ability to form hydrated salts depends on the metal's charge density and size.

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