True or False: The surface chemistry depends on the properties of the bulk material but is not only defined by the bulk material.

The correct answer reflects the nuanced relationship between surface chemistry and bulk material properties. Surface chemistry is influenced by the composition, structure, and properties of the bulk material; however, it is not wholly determined by them.

This is primarily because, at the surface of a material, various phenomena can occur that are distinct from the bulk characteristics. For instance, surface imperfections, grain boundaries, and the presence of adsorbates can modify the chemical reactivity and physical interactions of a surface. Additionally, factors such as surface roughness, energy, and modifications (e.g., due to oxidation or contamination) can have significant effects on the surface properties independent of the overall bulk material's characteristics.

Thus, while the bulk properties serve as a foundational element that influences surface chemistry, the actual surface attributes are shaped by a variety of additional factors, which leads to the understanding that surface chemistry is not exclusively defined by those bulk properties.