1. Balance the following nuclear decay processes and indicate which type of radiation is involved. a. 59 -> b. 102 251 No 247 100 Fm +

A sample of rock was found to contain 8.23 mg of rubidium-87 and 0.47 mg of strontium-87.. (a) Calculate the age of the rock if the half-life of the decay of rubidium by emission is 4.71010 y. (b) If some S3887r was initially present in the rock, would the rock be younger, older, or the same age as the age calculated in (a)? Explain your answer.

Write the balanced nuclear equation for the production of the following transuranium elements: (a) berkelium-244, made by the reaction of Am-241 and He-4. (b) fermiurn-254, made by the reaction of Pu-239 with a large number of neutrons. (c) lawrencium-257, made by the reaction of Cf-250 and B-11. (d) dubnium-260, made by the reaction of Cf-249 and N-15