State the penetrating range in air for the `alpha`, `beta` and `gamma` radiations.
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To answer the question regarding the penetrating range in air for alpha, beta, and gamma radiations, we can summarize the information as follows:
### Step-by-Step Solution:
1. **Understanding Alpha Radiation:**
- Alpha particles are positively charged particles that consist of two protons and two neutrons. Due to their larger mass and charge, they have a limited ability to penetrate materials.
- **Penetrating Range in Air:** Alpha particles can penetrate a thin film of air, specifically between **2.7 cm to 8.62 cm**.
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