Alkali and alkaline earth metals cannot be obtained by chemical reduction method . Explain .

Explanation

### Step-by-Step Solution:

1. **Understanding Alkali and Alkaline Earth Metals**:
- Alkali metals (Group 1) include lithium (Li), sodium (Na), potassium (K), etc.
- Alkaline earth metals (Group 2) include beryllium (Be), magnesium (Mg), calcium (Ca), etc.
- These metals are characterized by their tendency to lose electrons easily due to their electronic configuration.

2. **Electron Configuration and Size**:
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