Answer:
Nitrogen
Explanation:
Nitrogen present 78% in the earth's atmosphere
Answer:
1. matches with elements.
2. matches with compounds.
3. matches with atoms
4. matches with weight
5. matches with gas
6. matches with carbon dioxide
7. matches with Mendeleev (there's an element named after him)
8. matches with IUPAC
Hope that helped :)
Answer:
i donr reagly knove
Explanation: yeah i dont know
Hydrogen. The three most common organic compounds are hydrogen, oxygen, and nitrogen.