NH2CO2H is really just an NH2 bonded to a carbon atom which is doubly bonded to one oxygen atom and singly bonded to an OH molecule. The nitrogen atom in the NH2 molecule has three bonds available, so one goes to each of the hydrogen atoms, and one to the single carbon atom. The carbon atom has four bonds available, so one goes to the nitrogen, two go to one oxygen and one goes to the OH molecule.
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The correct Lewis structure for NH2CO2H has H bonded to N, one O double bonded to C, one O single bonded to C and one O double bonded to C. N has four bonds, C has three bonds, and each O has two bonds. The C=O bond has a double bond and the other O=C bond has a single bond.
The correct NCOH Lewis structure shows nitrogen bonded to carbon, which is bonded to oxygen and hydrogen.
The correct Lewis structure for a molecule with no anion would show all the atoms connected by lines to represent bonds, with the appropriate number of valence electrons around each atom.
To check a Lewis structure, count the total number of valence electrons to ensure all atoms have a full octet. Make sure formal charges are minimized, and resonance structures are considered if applicable. To correct a Lewis structure, try reassigning electron pairs or moving bonds to achieve more stable structures with lower formal charges and matching electronegativity trends.
The correct Lewis dot structure for chloroform (CHCl3) has a carbon atom in the center surrounded by three hydrogen atoms and one chlorine atom, each sharing a single bond with the carbon atom. There are also three lone pairs of electrons on the chlorine atom.
Resonance structure.