The correct statement for the symbol of a radioactive nuclide is the number of neutrons present in the nucleus of each atom is 126.
Radioactive nuclide or radioisotope is a different species of chemical element which have a similar mass.
These elements have unstable nuclei, which waste energy by emitting radiation such as alpha, and beta-gamma rays.
Thus, the correct option is C, the number of neutrons present in the nucleus of each atom is 126.
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