Write the Lewis structure for each molecule or ion. a. H₃COH d. O₂^2-

Verified step by step guidance

1. <b>Step 1:</b> Identify the total number of valence electrons for each molecule or ion. For H₃COH, count the valence electrons from H (1 each), C (4), and O (6). For O₂^2-, count the valence electrons from each O (6 each) and add 2 extra electrons for the 2- charge.
2. <b>Step 2:</b> Arrange the atoms to show how they are connected. For H₃COH, place C in the center with O and H atoms around it. For O₂^2-, place the two O atoms next to each other.
3. <b>Step 3:</b> Connect the atoms with single bonds initially. For H₃COH, connect C to O and C to each H. For O₂^2-, connect the two O atoms with a single bond.
4. <b>Step 4:</b> Distribute the remaining valence electrons to satisfy the octet rule (or duet for hydrogen). Start by completing the octets for the outer atoms first, then the central atom. Adjust bonds if necessary to ensure all atoms have a complete octet.
5. <b>Step 5:</b> Check the formal charges on each atom to ensure the most stable structure. Adjust the structure if needed to minimize formal charges, ensuring the overall charge of the ion is correct.