The Seven Elements
In Genshin Impact and Seven Elements, there exists the seven Elements: Pyro, Hydro, Anemo, Electro, Dendro, Cryo, and Geo.
By combining specific elements together, you're able to trigger Elemental Reactions! Each element is its own damage type, and non-elemental damage is considered Physical, which isn't an element.
When applying an element to an entity, it will decay over time, so there isn't any concept of "infinite elemental application"!
Elemental Combat
Main page: Elemental Combat
In Seven Elements, you may infuse your attacks with one of the seven Elements and deal Elemental Damage of that element.
Elemental Reactions
Main page: Elemental Reactions
When applying an element on a target already afflicted with an element, various Elemental Reactions may be triggered.
Elemental Application Systems
See also: Elemental Gauge Theory and Internal Cooldown
Elements aren't just a state of applied or removed, they are rather represented as a certain amount of gauge units. Elements can also only be applied in certain intervals, where elemental damage dealt within the interval only deals elemental damage but does not apply an Element.