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JAMB Chemistry 2013 Question 6

Question 6

Radioactivity

The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is

  1. A.carbon-14.
  2. B.phosphorus-32.
  3. C.cobalt-60.
  4. D.iodine-131.
Show the answer and explanation

Answer: C (cobalt-60.)

Explanation

Cobalt-60 gives penetrating gamma rays that pass through metal and show hidden cracks.