Metallic oxides are either _______ or ______ in nature.

Answer

To solve the question "Metallic oxides are either _______ or ______ in nature," we need to understand the characteristics of metallic oxides.

### Step-by-Step Solution:

1. **Understanding Metallic Oxides**:
- Metallic oxides are formed when metals react with oxygen. This reaction produces oxides that can exhibit different properties depending on the metal involved.

2. **Identifying the Types of Metallic Oxides**:
- Metallic oxides can be classified based on their chemical behavior when they react with acids and bases.
- The two main classifications are:
- **Basic Oxides**: These are oxides that react with acids to form salts and water. For example, sodium oxide (Na2O) reacts with hydrochloric acid (HCl) to form sodium chloride (NaCl) and water.
- **Amphoteric Oxides**: These oxides can react with both acids and bases. A common example is aluminum oxide (Al2O3), which can react with both hydrochloric acid and sodium hydroxide.

3. **Conclusion**:
- Based on the classifications, we can conclude that metallic oxides are either **basic** or **amphoteric** in nature.

### Final Answer:
Metallic oxides are either **basic** or **amphoteric** in nature.