Which atom in each group has the LARGEST atomic radius?
11. Si, S, or C1
12. C, Ge, or Pb
13. B, C, or Si
14. Al, Si, or C
15. Li, Be, or Mg
16. Na, Mg or Li
17. Ni, Ag, or Hg
18. Mn, Mo, or Ta
19. P, Fe, or La
20. Sc. Ag, or Bi

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