If a liter of water is cooled from 50 to 30 what happens to its volume

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.

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )