What is the size range of coarse particles?

The correct choice reflects the size range of coarse particles as typically defined within the context of particle classification in chemistry. Coarse particles are understood to be larger than fine particles, which typically range from 100 nm to 2,500 nm. When categorizing particulates, those that are classified as coarse often fall within the range of 2,500 nm to 10,000 nm. This encompasses larger dust or aerosol particles that can influence properties such as deposition in the respiratory system and other physical behaviors in different environments.

As for the other options, the range of 1 nm to 100 nm reflects nanoparticles, which are significantly smaller and exhibit different physical and chemical properties. The range of 10,000 nm to 1 µm is also a different classification, since 1 micron (or µm) is equivalent to 1,000 nm, thus this option does not align with the standard definition of coarse particles. Understanding these distinctions is important for applications across various scientific fields, including environmental science and materials science.