The most commonly used radioisotope in diagnostic medicine is technetium, 43Tc*, which is produced by the decay of molybdenum-99, 42Mo. (a) What type of decay process does $2Mo undergo to produce 93Tc*? (1 mark) (b) What is the equation for this decay process? (1 mark) (c) The half-life of $2 Mo is 66 hours. After 2 half-lives, how much of it has changed into a different element? (1 mark) (d) A patient is given a 600 MBq dose of 23Tc*. How long will it take for the activity to drop to 50 MBq? (1 mark) ) 23Tc* produces gamma rays when it decays. If its half-life is 6 hours, how much of it has changed into a different element after a period of 24 hours? (1 mark)