How many valence electrons should you use to draw a lewis structure of carbon dioxide (co2)

Can someone me with questions 12 and 13 plz.

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols