The study of carbon-containing compounds and their properties is called organic chemistry. Besides carbon atoms, organic compounds also can contain hydrogen oxygen, and nitrogen atoms (as well as other types of atoms). A common trait of simple organic compounds it to have Lewis structures where all atoms have a formal charge of zero. Consider the following incomplete Lewis structure for an organic compound called histidine (an amino acid), which is one of the building blocks of proteins found in our bodies:
Draw a complete Lewis structure for histidine in which all atoms have a formal charge of zero.
