The common point between modern chemistry and alchemy (alchemy) is to create new things at the molecular level. As for the creation of new elements, it is actually the task of nuclear physicists. They take some cyclotrons to bombard the new elements and then fill them into the periodic table. The fruit of victory as a chemist. Classical alchemy actually has elements such as elements and atoms, but it does not have rational thinking. For example, medieval Europeans believed that light, heavy, dry, and wet were basic physical properties. Dry and light are fire, dry and heavy are soil, wet and light are air, and wet and heavy are water. Therefore, any substance is composed of four basic elements: water, fire, soil, and air in different proportions. The result of this synthesis is obviously different from the current concept of the known world, and the understanding of the nature of the matter in other civilizations in the same period is also between mystery and reason. The most likely next is:. ['The starting point of modern chemical rational thinking.', 'How physicists create new elements.', 'The impact of classical alchemy on European civilization.', 'Knowing the various concepts of elements in the world.']