How many electrons (both lone and bond pairs) are shown in the Lewis diagram of CO₃² ^-?

Question

Quizplus · Accepted Answer

To determine the number of electrons in the Lewis diagram, we need to count the number of valence electrons for each atom and then subtract from that the number of electrons involved in bonding. For COS, we have a total of (6+8+6) = 20 valence electrons. The C-O bond involves 4 electrons, leaving 16 remaining. The C-S bond involves another 4 electrons, leaving 12. Finally, the S-O bond involves another 4 electrons, leaving 8. The lone pairs on each atom can then be added, giving a total of 24 electrons. The negative charge on the molecule indicates an additional electron, giving a final count of 25. However, we must subtract one electron for the extra negative charge, giving a total count of 24 electrons. Therefore, the answer is C.

How Many Electrons (Both Lone and Bond Pairs) Are Shown