Which of the following was not a feature of John Dalton's atomic research? a-mass ratios of elements involved in chemical reactions
b-experiments that refined and supported his hypothesis
c-careful observations and measurements
d-discovery of the atom's internal structure

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.