What is the atomic number of atom


Discuss the below:

Radiation Biological damage and Bohr model of atoms

Q1. 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?

Q2. A radioactive substance has a decay constant equal to 8.9x10^-3s-1. What is the half-life of this substance?

Q3. How many rad of 200-keV X-rays cause the same amount of biological damage as 50 rad of heavy ions? Explain please.

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Chemistry: What is the atomic number of atom
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