The experiment that shot heavy particles at a thin sheet of gold foil was responsible in leading to the discovery of the
a. atom.
b. neutron.
c. electron.
d. nucleus.

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.