👉 Symmetry is a property of an object or system that allows it to be divided into equal halves without any visible breaks. In physics, symmetry refers to the ability of objects and systems to maintain their shape when subjected to a certain set of transformations. In chemistry, symmetry can refer to the arrangement of chemical elements or compounds in a given structure. For example, the chemical formula for calcium (Ca) is Ca2+, which means that there are two atoms with one electron each, forming a single unit