Practice Problems

Question: Which of the following is least suitable for detecting particles given off in radioactive decay? A. geiger counter B. scintillation counter C. electron microscope D. all of these are suitable Answer: C (think about what an electron microscope is used for...)

Question: The expression that relates the amount of radioactive isotope left unreacted to the time elapsed is: A. k = 0.693/t B. Log(k2/k1) = Ea/19.1 x (T2 - T1)/(T2T1) C. Log(Xo/X) = kt/2.30 D. none of these Answer: C (where Xo is the amount of radioactive isotope at t=0, and X the amount left at time t, and k the rate constant)

Question: The expression that allows one to figure out the amount time taken to decay one half the amount of radioactive isotope is: A. t1/2 = 0.693/k B. Log(k2/k1) = Ea/19.1 x (T2 - T1)/(T2T1) C. Log(Xo/X) = kt/2.30 D. none of these Answer: A

|

home site map/index background information chemical reactions states of matter acid/base reactions

thermodynamics redox reactions atoms and molecules organic chemistry nuclear chemistry

help features reference thinkquest