Electrons A.
are responsible for creating protons.
B.
fill energy levels known as orbitals.
C.
fill the open spaces in the nucleus.
D.
are created by reacting neutrons.

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/XzW3SUN

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.