ABSTRACT
Quanticles such as simple molecules are not only too small to be seen with the most powerful optical microscopes but considerably so. High quality microscopes may be used in biology classes to observe cells and identify organelles, which are small compared to the cell, which is, in everyday terms, tiny. So quanticles sometimes undergo elastic collisions, like billiard balls, but they can also interpenetrate—more like when galaxies collide. Concepts such as molecule, ion, bond, orbital, and so forth refer to theoretical entities and allow the construction of models of chemical structures and theories to explain chemical phenomena. Explanation is fundamental to a science such as chemistry, and in chemistry lessons students will meet a large number of chemical explanations. The key point is that the property inferred at the macroscopic level is explained by quite different features in the submicroscopic model.
