7.01 use the following units: becquerel (Bq), centimetre (cm), hour (h), minute (min) and second (s)

the units for:

frequency of decay : becquerel (Bq), 1 (Bq) for 1 decay / sec 

distance : centimetres (cm), normally however is (m)

time : hour (h), minute (min) but normally (s)