How much heat is needed to rinse the temperature of 7g of water by 17c

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.

it's c. elements are placed in rows based on how may valencies electrons have.

10 years is the answer