Label each of the following steps for determining a molecular shape. Molecular formula Count all e groups around central atom (A). Step 1 Lewis structure Place lowest EN atom in center, total valence e, place single bonds first, distribute 8 e to all atoms, add multiple bonds as needed. Step 2 Electron- group arrangement Count bonding and nonbonding e groups separately. Step 3 Bond angles Note positions of lone pairs and multiple bonds. Step 4 Molecular shape (AXmEn) 4