- Madrona Creek is a stream in the Madrona neighborhood of Seattle, Washington, United States, located within Madrona Park. A daylighting project to restore the creekbed from above 38th Avenue downhill to Lake Washington is underway as of 2006.
- Ion (Wikipedia)
An ion (/ˈaɪ.ɒn, -ən/) is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by convention. The net charge of an ion is not zero because its total number of electrons is unequal to its total number of protons.