What happens to matter when a wave travels through it?

is a disturbance which travel through a medium that enables energy to be transferred from one point to another

gravity causes stares to cluster i think so

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.