A cobalt-60 from Delhi University, which was unused for 25 years, was sold to unsuspecting scrap dealers. They then dismantled it and due to the harmful radiation emmited by the cobalt-60 pencils, there were 5 people who were exposed to radiation in which one died.
Cobalt-60
Cobalt-60 has an 1/2 life of 5.24 years
Cobalt 60 has an extra neutron buit that does not affect chemical properties
Cobalt-60 decay to nickel-60:Co-60------------Ni-60 + 1 electron + 1 neutrino + gamma rays
Cobalt 60 is a radioactive chemical not usually available for sale. Cherolet manufactures the car Cobalt, which can accelerate from 0 to 60 mph in 5.2 seconds. Its cost is about $30,000.
Cobalt 60 is a very valuable radiation source for the treaments of many types of cancers.
Since cobalt has an atomic number of 27, any isotope of it contains 27 protons and 27 electrons per atom. The isotope with mass number 60 contains (60 - 27) or 33 neutrons per atom.
Tuesday
One quarter-Apex
10.6 years
Radioactive cobalt-60 apex