Final answer:
A neutron star's blackbody emission peaks in the X-ray region of the electromagnetic spectrum due to its high temperature and energy levels, as indicated by Planck's law.
Step-by-step explanation:
The blackbody emission of a neutron star peaks in the X-ray region of the electromagnetic spectrum. Neutron stars are incredibly dense and hot, which means the energy and temperature are high enough for their peak radiation to be in the X-ray spectrum. This observation aligns with the behavior of blackbodies, which, as per Planck's law, will radiate most intensely at shorter wavelengths (higher energies) as their temperature increases. This is evident in astronomical observations where neutron stars and other high-energy objects like white dwarfs and black holes show significant X-ray emissions.
Additionally, it's crucial to understand the general order of the electromagnetic spectrum based on energy per photon, from highest to lowest: gamma > X-ray > ultraviolet > visible > infrared > microwave > radio. In the context of neutron stars, their peak emission in the X-ray region indicates a far higher temperature compared to a body emitting primarily in the infrared, visible, or ultraviolet.