The bond order of `CO` molecule is 2.5.`

Explanation

To determine the bond order of the carbon monoxide (CO) molecule, we can follow these steps:

### Step 1: Determine the total number of electrons in CO
- Carbon (C) has 6 electrons, and Oxygen (O) has 8 electrons.
- Therefore, the total number of electrons in CO = 6 (from C) + 8 (from O) = 14 electrons.

### Step 2: Write the molecular orbital configuration for CO
- The molecular orbital (MO) configuration for CO can be represented as:
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