Write the resonance structures for `SO_3 and NO_(3)^(-)`

Explanation

To write the resonance structures for sulfur trioxide (SO₃) and the nitrate ion (NO₃⁻), we will follow these steps:

### Step 1: Determine the Valence Electrons
- **Sulfur (S)** has 6 valence electrons.
- **Oxygen (O)** has 6 valence electrons, and there are three oxygen atoms in SO₃.

For SO₃:
- Total valence electrons = 6 (from S) + 3 × 6 (from O) = 24 valence electrons.
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