This problem set is due at $10am$ on Oct. $27,2023.$

For each of the following molecules or polyatomic ions, draw a correct Lewis structure.

Please follow these guidelines carefully in writing your answers:

$(1)$ Make sure every atom $($except $H)$ obeys the octet rule.

$(2)$ If an atom has a nonzero formal charge, write that charge directly above the atom.

If a formal charge is zero, you don't have to write it$.$ Formal charges of $+1$ or $-1$ are

common. Lewis structures with formal charges of $+2$ or $-2$ are unstable.

$(3)$ If there are equivalent resonance structures, please write them all, using the special

arrow symbol reserved for resonance. If there are multiple inequivalent resonance struc$-$

tures, you only need to write the one that is most stable.

a$.C{F}_4$

b$.PC{l}_3$

c$.N{H}_2^{-}$

d$.B{F}_4^{-}$

e$.$ NNO

f$.C{O}_3^{2-}$

g$.N{O}_3^{-}$

h$.$ ONF

i$.HCN$

j$.S{O}_2$

k$.N{O}_2^{-}$

$N{O}_2^{+}$

m$.$ OCS

n$.HC{O}^{-}$

o$.N_3^{-}$

p$.C{H}_3^{-}$

q$.O{H}_3^{+}$

For each item above, write the name of the molecular geometry, using VSEPR theory.