:nitrogen has two isotopes, n-14 and n-15, with atomic masses of 14.00031 amu and 15.001 amu, respectively. what is the percent abundance of n-15?

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.