Final answer:
The IBr molecule has 14 electrons occupying the MO sketched here.
Step-by-step explanation:
The IBr molecule has a total of 14 electrons occupying the molecular orbital (MO) sketched here. Each iodine (I) atom contributes 7 electrons, and there is one negative charge, resulting in a total of 14 electrons. The Lewis electron structure of IBr would be represented as:
I-Br