Fill in the blanks
The compounds of Al are predominantly ............ due to the ............ size and ............ charge of `A1^(3+)` ions.

Explanation

To fill in the blanks for the question, we need to analyze the properties of aluminum compounds and the characteristics of the aluminum ion (Al³⁺).

### Step-by-Step Solution:

1. **Identify the Nature of Aluminum Compounds**:
- Aluminum compounds are predominantly **covalent**. This is because, although they may be classified as ionic, they exhibit significant covalent character due to certain factors.

2. **Understand the Factors Influencing Covalent Character**:
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