2437

Physics Modern Physics Level: High School

Radioactivity

A particle radioisotope has a half-life of 23.4 hours . At time t = 0, the activity is 6.90 x 10^9 Bq . Calculate the following .

a) The activity when t = 23.4 hours .

b) The time when activity will be reduced by a factor of 100 .

c) The value of the decay constant .

d) The original number of radioactive nuclei .

e) The number of radioactive nuclei at t = 23.4 hours .