What is the purpose of boron or cadmium rods inserted into nuclear reactors?   A) They catalyze the nuclear fission reaction in the reactor. B) They initiate the chain reaction in the reactor. C) They absorb heat from the fission reactions. D) They absorb excess neutrons to keep the chain reactions in the reactor under control. E) They are the fissionable materials in the reactor.

Please see attached question.

a) Mrs. Price's son, Liam is currently working as a boilermaker at the Darlington Nuclear Power plant. He is working with Uranium-237 which has a half-life of 13.75 days. What mass of an initial sample of 567.5g of uranium-237 would remain after 56 days? b) Write the complete reaction for the decay of Po-210 if it undergoes 2 consecutive alpha decay followed by a beta decay followed by another alpha decay.

show two balanced nuclear equations which occur in the nuclear fission reactor.

21. As stated in the previous problem, Cesium-137 is a radioactive product of nuclear power plants. Cs-137 and beta minus decays into barium, Ba-137. a) Write out the radioactive decay formula correctly listing the atomic numbers and mass numbers of the parent and daughter isotope as well as the two ejected particles. b) Specify if one of the ejected particles is an electron or positron?

A radioactive element, A, with a mass of 212 and atomic number 84, emits an alphaparticle and changes into element B. Element B emits a beta particle and is convertedto element C.a) Write nuclear equations for the formation of elements B and C.b) What are the atomic masses and atomic number of elements A, B and C?c) Name elements A, B and C.