Posted: March 24th, 2017

How many nuclei are present 1h and 49 min later? 8) What is the activity of a sample of Carbon-14 that contains 8.9 x 1022 nuclei?

) What is the approximate radius of Carbon-12? 2) (a)What is the approximate radius of a Fe-56 nucleus? (b) Approximately what is the value of A for a nucleus whose radius is 3.0 x 10-15m? 3) Calculate the binding energy per nucleon for a U-238 nucleus? 4) In the reaction 1H + 1n -> 2H + Y what is the energy of Y(Gamma) rays emitted here? 5) Polonium-214 can decay by alpha decay. a) The product of its decay has how many fewer protons the polonium-214? b) Write the nuclear equation for this decay. 6) Write the nuclear equation for the decay of Co- 60? If there are any alpha, beta or gamma particles created what is their maximum kinetic energy created? 7) Francium-223 has a half-life of 21.8 min. a) How many nuclei are initial present in a 25.0 mg sample? b) How many nuclei are present 1h and 49 min later? 8) What is the activity of a sample of Carbon-14 that contains 8.9 x 1022 nuclei?