GEOLOGY

Detailed explanation-1: -The two ions that are present most often in seawater are chloride and sodium. These two make up over 90% of all dissolved ions in seawater. The concentration of salt in seawater (its salinity) is about 35 parts per thousand; in other words, about 3.5% of the weight of seawater comes from the dissolved salts.

Detailed explanation-2: -Two of the most prevalent ions in seawater are chloride and sodium. Together, they make up around 85 percent of all dissolved ions in the ocean. Magnesium and sulfate make up another 10 percent of the total.

Detailed explanation-3: -Complete answer: The most abundant salt found in seawater is Sodium Chloride (NaCl), a salt which we use in food. Sodium Chloride dissolves in water into its ions, which are present at much higher levels than components of any other salt.

Detailed explanation-4: -The six most abundant ions of seawater are chloride (Cl−), sodium (Na+), sulfate (SO24−), magnesium (Mg2+), calcium (Ca2+), and potassium (K+). By weight these ions make up about 99 percent of all sea salts.

Detailed explanation-5: -Salinity in seawater is mainly due to presence of sodium chloride. Abundant element in the seawater is chloride and constitutes 1.94% of all the constituents. Chloride is followed by sodium which constitutes 1.08%, potassium 0.04% and minute quantities of iodine.