Classify the following molecules/ions as nucleophiles or electrophiles
`HS^(-),BF_(3),CH_(3)CH_(2)O^(-),NO_(2)^(+),NH_(3),NH_(2)^(-),Cl^(+)`

Explanation

To classify the given molecules/ions as nucleophiles or electrophiles, we can follow these steps:

### Step 1: Understand the definitions
- **Nucleophiles**: These are electron-rich species that have a tendency to donate an electron pair. They can be negatively charged or neutral.
- **Electrophiles**: These are electron-deficient species that need electrons. They can be positively charged or neutral.

### Step 2: Analyze each species
1. **HS⁻ (Hydrosulfide ion)**:
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