Final answer:
Conservative ions in the ocean exhibit well-mixed distribution and have a long residence time, but they are not non-reactive.
Step-by-step explanation:
Conservative ions exhibit several characteristics in the ocean, but one characteristic they do not exhibit is non-reactive behavior. Conservative ions are well-mixed throughout the ocean and have a long residence time, which means they stay in the ocean for a significant period. These ions, such as chloride and sodium, do not undergo chemical reactions and their concentrations remain relatively constant in seawater.
Learn more about Characteristics of conservative ions in the ocean