x-ray

1. What is the energy in J and eV and associated with the a Cu⁺²⁸ 2p to 1s electron transtion?

2. What wavelength of light would be emitted in this transition of #1?

3. If the screening of a 1s electron was .30 if in same shell, 0 if in shell above, and 1 if in shell below; what would be the the energy in J and eV and associated with the a Cu⁺²⁷ 2p to 1s electron transtion if the second electron is in the 1s shell?

4. What wavelength of light would be emitted in this transition of #3?