Assignment:
Question 1. An electron drops from the L shell to the K shell and gives off an X-ray with a wavelength of 0.0205 nm. What is the atomic number of this atom?
Question 2. A radioactive substance has a decay constant equal to 8.9x10^-3s-1. What is the half-life of this substance?
Question 3. How many rad of 200-keV X-rays cause the same amount of biological damage as 50 rad of heavy ions? Explain please.