The two most common forms of elemental carbon are graphite and
Three naturally occurring allotropes of carbon are known to exist: amorphous, graphite and diamond.
There are four allotropes of carbon. You can read about them here.
http://en.wikipedia.org/wiki/Allotropes_of_carbon
diamond. Graphite and diamond are both allotropes of carbon, which means they are different forms of the same element, carbon. The difference between graphite and diamond lies in their crystal structures and bonding arrangements.
To determine the two most common forms of elemental carbon, you can conduct a basic search or consult a reputable source such as a chemistry textbook or reliable website. Here's how to find the answer:
1. Open a web browser or launch a search engine.
2. Type in the search query "most common forms of elemental carbon."
3. Click on a trustworthy source, such as a scientific website or educational institution.
4. Look for information related to carbon allotropes or forms of elemental carbon.
5. Read the content to find out that graphite and diamond are the two most common forms of elemental carbon.
Remember that while I am providing you with the answer here, it is always important to fact-check and verify information from reputable sources to ensure accuracy.