Question

Draw Lewis (electron dot) structures for CO2 and H2S showing all valence electrons.

A) CO₂: O=C=O; H₂S: H-S-H
B) CO₂: O-C=O; H₂S: H-S-H
C) CO₂: O=C=O; H₂S: H-S-S-H
D) CO₂: O-C-O; H₂S: H-S-H

Answer 1

The correct Lewis electron-dot structure for CO2 is O=C=O with double bonds, and for H2S it is H-S-H with sulfur having two lone pairs of electrons.

Step-by-step explanation:

The student is asking for the Lewis electron-dot structures for CO2 and H2S which depict the valence electrons around each atom. For CO2, the correct structure is O=C=O, with carbon in the center forming double bonds with two oxygen atoms. Each double bond consists of two pairs of shared electrons. For H2S, the structure is H-S-H, with sulfur in the center binding to two hydrogen atoms through single bonds. Sulfur has two lone pairs of electrons, giving it a total of eight valence electrons, while each hydrogen atom has its single valence electron involved in bonding.