A student prоpоses the fоllowing Lewis structure for the pyrophosphаte ion, P2O74–. In this imаge, O is the centrаl atom. It is bonded to one P on the left and to one P on the right. In addition, this O has two lone pair electrons. In addition to the central O, each P is bonded to three more O as follows: P on left is single bonded to three O. Each O has three lone pair electrons. P on right is single bonded to two O. Each of these O has three lone pair electrons. It is also double bonded to one O, which has two lone pair electrons. The structure is within brackets and has a 4- on the top right corner outside of the bracket. Assign a formal charge to each atom in the student's Lewis structure. atom formal charge left P [L] outer O single-bonded to left P [C] outer O double-bonded to right P [R]