Final answer:
Seawater is a solution containing various ions, mostly Na+ and Cl-, but also other ions like SO4^2-, Mg^2+, Ca^2+, and K^+. It also contains suspended crystals of various salts. Approximately 3.5% of seawater is dissolved solids, with NaCl being the most abundant. Seawater acts as a homogeneous mixture or solution.
Step-by-step explanation:
Seawater is a solution containing various ions, mostly Na+ and Cl-, but also SO4^2-, Mg^2+, Ca^2+, and K^+. In addition to water and dissolved ions, ocean water also contains suspended crystals of various salts. Approximately 3.5% of seawater is dissolved solids, with NaCl being the most abundant. Seawater acts as a homogeneous mixture or solution.