The number of lone pairs in `BF_4^(-)` is _____ .

Explanation

To determine the number of lone pairs in the ion \( BF_4^- \), we will follow these steps:

### Step 1: Determine the total number of valence electrons
- Boron (B) has 3 valence electrons.
- Each Fluorine (F) has 7 valence electrons, and there are 4 Fluorine atoms.
- The negative charge (-1) indicates that we have one extra electron.

**Calculation:**
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