Among the alkali metals, which element has the lowest ionic radius ?

Explanation

To determine which alkali metal has the lowest ionic radius, we can follow these steps:

### Step 1: Identify the Alkali Metals
The alkali metals are found in Group 1 of the periodic table. The elements in this group include:
- Lithium (Li)
- Sodium (Na)
- Potassium (K)
- Rubidium (Rb)
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