What process helps to purify water in nature?

Filtration,Sedimentation and distillation

Explanation:

These 3 are physical processes which are commonly used in nature while in chemical processes,Chlorination is done to eliminate bacteria and other germs present

Happy 2 have helped in some way

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.