How can reaction outcomes become predicted based on periodic table trends?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

How far is the region from the equator or control climate

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering