Which of the following acts WITHIN a molecule? A. dispersion forces
B. dipole-dipole forces
C. covalent bonds
D. hydrogen bonds

hydrogen bonds

Explanation:

it's answer

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.