The number of atoms in 1mg of radium is 2.66 * 1018  how to calculate the activity of a 1mg sample of radium ?

What is the decay probability per second per nucleus of a substance with a half-life of 5.0 hours?

Would you kindly explain step by step as you answer the following question... A sample of material contains one milligram of Iodine-131. Iodine -131 has a half - life of 8.02 days. Find:a) The number of atoms of iodine-131 initially presentb) The activity of the sample in becquerel

Part A Calculate (in MeV) the total binding energy for 40 Ar. Express your answer in mega-electron volts to four significant figures. ? MeV Submit Previous Answers Request Answer X Incorrect; Try Again; 7 attempts remaining Part B Calculate (in MeV) the binding energy per nucleon for 40 Ar. Express your answer in mega-electron volts to three significant figures. Ην ΑΣφ ? Var = MeV Submit Request Answer Part C Calculate (in MeV) the total binding energy for 40K. Express your answer in mega-electron volts to four significant figures. nνα ΑΣφ ? BK = MeV Submit Previous Answers Request Answer

14 A sample has a ¹4C activity of 0.0027 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have been as much as 27% larger. Repeat part (a), taking into account this 27% increase. (a) Number i (b) Number i Units Units

A, Explain the importance of reducing exposure dose and time to a patient undergoing a diagnostic X-ray examination. Describe ways to achieve this. B, Calculate the wavelength of the most energetic X-rays produced by tube operating at pd of 1×10^6 V, h= 6.6×10^(-34) J, e=1.6×10^(-19) C, c=3×10^8 ms^(-1)