Arrange according to increasing Lewis acid character, `SiF_(4)`, `SiCl_(4)` `SiBr_(4)`. `SiI_(4)`.

Explanation

To arrange the compounds SiF₄, SiCl₄, SiBr₄, and SiI₄ according to increasing Lewis acid character, we need to understand the concept of Lewis acids and how the properties of the halogens influence the Lewis acid character of their respective silicon tetrahalides.

### Step-by-Step Solution:

1. **Understanding Lewis Acids**:
- A Lewis acid is defined as a substance that can accept a lone pair of electrons. The ability of a compound to act as a Lewis acid depends on its ability to attract electron pairs.

2. **Analyzing the Halogens**:
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