[Answer] A radioactive nuclide that is used for radiation therapy for cancer has 33 neutrons and a mass number of 60. Which is the correct symbol for this nuclide?

Answer: 60 27 Co
A radioactive nuclide that is used for radiation therapy for cancer has 33 neutrons and a mass number of 60. Which is the correct symbol for this nuclide?

Neutron radiation is a form of ionizing radiation that presents as free neutrons .Typical phenomena are nuclear fission or nuclear fusion causing the release of free neutrons which then react with nuclei of other atoms to form new isotopes—which in turn may trigger further neutron radiation . Free neutrons are unstable decaying into a proton an electron plus an anti-electron-neutrino …

There are 37 known isotopes of iodine (53 I) from 108 I to 144 I; all undergo radioactive decay except 127 I which is stable. Iodine is thus a monoisotopic element.. Its longest-lived radioactive isotope 129 I has a half-life of 15.7 million years which is far too short for it to exist as a primordial nuclide . Cosmogenic sources of 129 I produce very tiny quantities of it that are too …

Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air forming thorium dioxide; it is moderately hard malleable and has a high melting point.Thorium is an electropositive actinide whose chemistry is dominate…

Leave a Reply