In gruop VIA or group 16, Polonium is metallic while all other elements are ..............

Explanation

### Step-by-Step Solution:

1. **Identify the Group**: The question refers to Group VIA or Group 16 of the periodic table. This group includes the elements Oxygen (O), Sulfur (S), Selenium (Se), Tellurium (Te), and Polonium (Po).

2. **Understand the Trend in Metallic Character**: In the periodic table, metallic character increases as you move down a group. This is due to the increase in atomic size and the decrease in ionization energy, which makes it easier for atoms to lose electrons.

3. **Classify the Elements**:
- **Oxygen (O)** and **Sulfur (S)** are classified as non-metals.
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