The number of non-bonding electrons of `N_(2)` is________.

Explanation

To determine the number of non-bonding electrons in the nitrogen molecule (N₂), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Valence Electrons of Nitrogen:**
- Each nitrogen atom has 5 valence electrons. Therefore, for two nitrogen atoms in N₂, the total number of valence electrons is:
\[ 5 \text{ (from first N)} + 5 \text{ (from second N)} = 10 \text{ valence electrons} \]

2. **Determine the Bonding Electrons:**
- In the N₂ molecule, the two nitrogen atoms share three pairs of electrons to form a triple bond. Each pair of electrons in a bond is counted as 2 electrons. Thus, the total number of bonding electrons is:
\[ 3 \text{ (bonds)} \times 2 \text{ (electrons per bond)} = 6 \text{ bonding electrons} \]

3. **Calculate the Non-bonding Electrons:**
- To find the number of non-bonding electrons, we subtract the number of bonding electrons from the total number of valence electrons:
\[ 10 \text{ (total valence electrons)} - 6 \text{ (bonding electrons)} = 4 \text{ non-bonding electrons} \]

4. **Identify Lone Pairs:**
- Each nitrogen atom has 2 non-bonding electrons, which are present as lone pairs. Therefore, in total, there are:
\[ 2 \text{ (from first N)} + 2 \text{ (from second N)} = 4 \text{ non-bonding electrons} \]

### Final Answer:
The number of non-bonding electrons in N₂ is **4**.

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