Bulk and surface properties of matter including nanoparticles (chemistry only): แบบฝึกหัด

Nanoscience refers to the study of structures that fall within a specific size range. What is the standard diameter range for structures classified as nanoparticles?

Fine particles (\(PM_{2.5}\)) have diameters between \(100\text{ nm}\) and \(2500\text{ nm}\). How many meters is \(2500\text{ nm}\)?

Nanoparticles of silver are used for their antibacterial properties in socks and bandages. Which of the following is a potential risk associated with the widespread use of these nanoparticles?

Nanoparticles are often used in sunscreens. Why might they be more effective than larger particles of the same material?

In the context of particulate matter, coarse particles \((PM_{10})\) are often referred to as dust. What is the diameter range for these particles?

State one potential application of nanoparticles in the field of medicine and explain why they are useful in this specific context.

A sample of particulate matter is classified as fine particles \( (\text{PM}_{2.5}) \). State the range of diameters for these particles and explain how their size compares to that of coarse particles \( (\text{PM}_{10}) \).

Predict how the surface area to volume ratio of a cube changes if the length of its side is decreased by a factor of 10, and explain how this property affects the effectiveness of nanoparticles as catalysts compared to bulk materials.