a sample of bromine was analysed in a time of flight (tof) mass spectrometer and
found to contain two isotopes, 79br and 81br
after electron impact ionisation, all of the lons were accelerated to the same
kinetic energy (ke) and then travelled through a flight tube that was 0.950 m long.
the 79br+ lons took 6.69 x 10^-4 to travel through the flight tube.
calculate the mass, in kg, of one lon of 79br+
calculate the time taken for the 81br+ ions to travel through the same flight tube.
the avogadro constant, l = 6.022 x 10mol!
ke = 5 roy? where m = mass (kg) and v= speed (m 3-')
where d = distance (m) and t = time (s)
(5 marks)

Listenbase your answer to the question on the information below. nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body. cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment. which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61