Pure forms of carbon. Carbon is everywhere: it forms rocks, plants, animals (proteins, DNA, etc), plastics, etc. Those usually contain carbon as well as other atoms, like nitrogen, oxygen and hydrogen among others. There are some materials, however, that contain only carbon.
The Healthy Pregnancy Book: Month by Month, Everything You Need to Know from America's Baby Experts (Sears Parenting Library) Paperback â September 24, 2013. Find all the books, read about the author, and more.
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