Memory Game Lewis StructuresOnline version Formal Charges, Resonance structures by Marissa Corr # valence electrons - 1/2(# bonding e's) - (# non-bonding e's) 7- (.5)(2) - 6 =0 The molecular geometry of CF4 is 1, 3 3, 1 Formula for formal charge 1, 2, 8 What is the mathematical process of finding the formal charge of Cl in HCl? Tetrahedral The most stable resonance charge has a formal charge that is: 18 Bent The molecular geometry of SO2 is How many single bonds and how many lone pairs does HCl contain? zero on all elements, or has the negative charge on the most electronegative atom.