Liberal Dictionary English Dictionary
noun
- the isotopic carbon atom that comprises 99 percent of naturally occurring carbon, and that since 1961 has been used as the standard for atomic weight by representing a unit of 12.00000.
- A stable isotope of carbon, having six protons and six neutrons in the nucleus. Carbon 12 makes up most naturally occurring carbon.
Illustrated Glossary of Organic Chemistry – Carbon-12
Illustrated Glossary of Organic Chemistry – Carbon-12
Why Carbon 12? – YouTube
Why Carbon 12? – YouTube
Clipart – Atom: Carbon 12