Final answer:
The word element at the end of a medical term is called the suffix, which in chemistry is used in the common system to denote the charge state of cations, with -ic for higher and -ous for lower charge states.
Step-by-step explanation:
The element located at the end of a medical term is known as the suffix. In the context of chemical nomenclature, within the health sciences, the common system often appends suffixes such as -ic or -ous to the stem of an element's name to indicate the presence of cations with different charges. For instance, in the Latin naming tradition of elements, the suffix -ic is used for the higher charge state of a cation, while -ous indicates a lower charge state. It is crucial to recognize the particular usage of these suffixes, as they directly affect the naming of compounds and understanding of their properties in the field of chemistry.