객관식
Which of the following best represents the correct Lewis structure for (formaldehyde)?
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1. A Review of General Chemistry
Lewis Structure
객관식
Which of the following best describes the correct Lewis structure for (phosgene)?
A
The central atom is oxygen, single bonded to two chlorine atoms and double bonded to carbon.
B
The central atom is chlorine, double bonded to carbon and single bonded to oxygen.
C
The central atom is carbon, double bonded to oxygen and single bonded to two chlorine atoms, with all atoms having complete octets.
D
The central atom is carbon, single bonded to oxygen and double bonded to two chlorine atoms.
검증된 단계별 안내1
Identify the central atom in the molecule. Typically, the least electronegative atom (excluding hydrogen) is the central atom. In phosgene (Cl\_2CO), carbon is less electronegative than oxygen and chlorine, so carbon is the central atom.
Determine the connectivity of atoms around the central carbon. Carbon usually forms four bonds to complete its octet. Since there are two chlorine atoms and one oxygen atom, consider how these atoms bond to carbon.
Assign bonds between carbon and the other atoms. Carbon will form single bonds with each chlorine atom and a double bond with the oxygen atom to satisfy the octet rule for all atoms.
Complete the octets for the surrounding atoms. Chlorine atoms typically form one single bond and have three lone pairs, while oxygen forms a double bond with carbon and has two lone pairs to complete its octet.
Verify the Lewis structure by counting total valence electrons and ensuring all atoms have complete octets. The structure should show carbon as the central atom double bonded to oxygen and single bonded to two chlorine atoms, with all atoms having full octets.
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