Noun
English Wikipedia has an article on:carbon-12Wikipedia
carbon-12 (uncountable)
(physics) The most abundant of the two stable isotopes of carbon, 6C, having six protons and six neutrons; it is the standard for atomic weight and is used to define the mole.
By definition, carbon-12 has a molar mass of 12 g/mol. Source: Internet
Applications of the principle The nucleosynthesis of carbon-12 Fred Hoyle may have invoked anthropic reasoning to predict an astrophysical phenomenon. Source: Internet
An example of use of a mass number is "carbon-12," which has 12 nucleons (six protons and six neutrons). Source: Internet
In the nuclear reaction that occurs, a beryllium nucleus is transmuted into carbon-12, and one free neutron is emitted, traveling in about the same direction as the alpha particle was heading. Source: Internet
IUPAC prefers that isotope symbols be written in superscript notation when practical, for example 12 C and 235 U. However, other notations, such as carbon-12 and uranium-235, or C-12 and U-235, are also used. Source: Internet
Physical and chemical details main In nature, carbon exists as two stable, nonradioactive isotopes : carbon-12 ( mainC ), and carbon-13 ( mainC ), and a radioactive isotope, carbon-14 ( mainC ), also known as "radiocarbon". Source: Internet