Consider the proposed formal charges for the molecule MX20 below. Which of the following options are possible? Option #1: All atoms have formal charges of zero. Option #2: The Mand X atoms have a formal charge of zero. O has a formal charge of -1. Option #3: The M and X atoms have a formal charge of zero. O has a formal charge of -2. Option #4: Both X atoms have a formal charge of +1. O has a formal charge of -1. M has a formal charge of -1.
