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