(chemistry only) Explain why nanoparticles can have different properties from the same material in bulk.

In the subtopic Sizes of particles and their properties, this learning objective focuses on (chemistry only) Explain why nanoparticles can have different properties from the same material in bulk. Within Bulk and surface properties of matter including nanoparticles (chemistry only), students should explain this idea in the exact curriculum context rather than as an isolated fact. Approved keywords for this objective include chemistry only, nanoparticle, and nano. nanoparticle means structures of the order of a few hundred atoms that can exhibit different properties compared to the same material in bulk. Avoid students often think that nanoparticles have the same properties as the bulk material they are derived from; instead students should focus on how the size and surface area of nanoparticles can lead to different chemical and physical properties compared to the bulk material. For exam answers, focus on how the high surface area to volume ratio of nanoparticles leads to different properties compared to bulk materials.