carbón
61carbon-14 — noun a long lived naturally occurring radioactive carbon isotope of mass 14, used in carbon dating and as a tracer in biochemistry …
62carbon — noun 1 (U) a simple substance that exists in a pure form as diamonds, graphite etc or in an impure form as coal, petrol etc 2 (C, U) carbon paper 3 (C) a carbon copy (1) …
63carbon 12 — or carbon 12 n. chem. the isotopic carbon atom used as the standard for atomic weight • Etymology: 1940–45 …
64carbon-14 — carˈbon 14 noun A radioactive isotope of carbon, used eg as a tracer element in biological studies or in dating archaeological material • • • Main Entry: ↑carbon …
65carbon-12 — carˈbon 12 noun An isotope of carbon with a mass of 12, used as a standard in determining relative atomic and molecular weight • • • Main Entry: ↑carbon …
66carbon 14 — noun Date: 1936 a heavy radioactive isotope of carbon of mass number 14 used especially in tracer studies and in dating old materials (as archaeological and geological specimens) …
67carbon 14 — radiocarbon (def. 1). Also, carbon 14 /kahr beuhn fawr teen , fohr /. [1935 40] * * * …
68carbon-11 — A cyclotron produced, positron emitting radioisotope of carbon with a half life of 20.3 minutes; used in positron emission tomography (PET) …
69carbon-12 — The standard of atomic mass, 98.90% of natural carbon …
70carbon-13 — A stable natural isotope, 1.1% of natural carbon …