Categorise the following molecules/ions ad nucleophile or electrophile.
(1) `HS^(Ө)`
(2) `BF_3`
(3) `C_2H_5O^(Ө)`
(4) `(CH_3)_3 ddot N`
(5) `C1^(Ө)`
(6) `CH_3 - overset (oplus) C = O`
(7) `:overset (Ө) NH_2`
(8) `overset (oplus) N O_2`.

Explanation

To categorize the given molecules/ions as nucleophiles or electrophiles, we need to understand the definitions of both terms:

- **Electrophiles** are species that are electron-deficient and can accept a pair of electrons. They are typically positively charged or have an incomplete octet.
- **Nucleophiles** are species that are electron-rich and can donate a pair of electrons. They are usually negatively charged or have lone pairs of electrons.

Now, let's analyze each of the given species one by one:

1. **HS⁻**:
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