Radioactive alkali metal is ………. And its outer electronic configuration is …………. .

Explanation

To solve the question, we need to identify the radioactive alkali metal and its outer electronic configuration. Here’s the step-by-step solution:

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