The three electron bond is present in the structure of

Options

A. `N_2 O`
B. `NO`
C. `N_2 O_3`
D. `N_2 O_5`

Answer

To determine which compound has a three-electron bond, we need to analyze the bonding in the given compounds. A three-electron bond typically refers to a bond where three electrons are shared between two atoms, which is characteristic of certain nitrogen oxides.

### Step-by-Step Solution:

1. **Identify the Compounds**: The question mentions several compounds, including N2O, NO, N2O3, N2O4, and N2O5. We need to analyze the bonding in these compounds.

2. **Analyze N2O (Dinitrogen Monoxide)**:
- The structure of N2O involves two nitrogen atoms and one oxygen atom.
- The bonding typically involves a double bond between one nitrogen and oxygen and a single bond between the two nitrogen atoms.
- Thus, N2O does not have a three-electron bond.

3. **Analyze NO (Nitric Oxide)**:
- In NO, nitrogen forms a double bond with oxygen.
- This bond consists of two shared electrons, hence NO does not have a three-electron bond.

4. **Analyze N2O3 (Dinitrogen Trioxide)**:
- The structure of N2O3 involves nitrogen and oxygen atoms forming multiple bonds.
- However, it does not exhibit a three-electron bond.

5. **Analyze N2O4 (Dinitrogen Tetroxide)**:
- N2O4 consists of nitrogen and oxygen atoms with double bonds.
- Similar to N2O3, it does not exhibit a three-electron bond.

6. **Analyze N2O5 (Dinitrogen Pentoxide)**:
- N2O5 has nitrogen and oxygen atoms with multiple bonds.
- It does not exhibit a three-electron bond.

7. **Identify the Compound with a Three-Electron Bond**:
- The compound that exhibits a three-electron bond is **NO (Nitric Oxide)**.
- In NO, the bond can be represented as a resonance structure where one nitrogen atom shares three electrons with the oxygen atom, resulting in a three-electron bond.

### Conclusion:
The compound that has a three-electron bond is **NO (Nitric Oxide)**.