Using the "octet rule" write the Lewis formulas for NF3 and NO3-.

Answer 1

http://www.green-planet-solar-energy.com/lewis-dot-structure.html

http://www.google.com/search?q=lewis+structure+NO3^-&hl=en&client=firefox-a&hs=M7v&rls=org.mozilla:en-US:official&prmd=imvnsfd&tbm=isch&tbo=u&source=univ&sa=X&ei=_yBFT-77Eun9sQLdpdnDDw&ved=0CDMQsAQ&biw=783&bih=399