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The carbon family is often referred to as the "Carbon Family". Boring, but true.
Carbon 13 is not an element it is an isotope. Carbon is an element but Carbon 13 is not.
carbon -12 is the most common isotope of carbon.
98.9% of all carbon is Carbon-12
So, if you find some carbon. charcoal diamond or any other form of carbon, I am 98.9%sure it is C-12.
Isotopes.
The chemical formula of carbon tetrachloride is CCl4; so contain carbon and chlorine.