What trend is seen in atom size, going down the periodic table?

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases