How much energy is contained in 1 mol of each?
a. X-ray photons with a wavelength of 0.135 nm
b. y -ray photons with a wavelength of 2.15 x 10-5 nm.
SolutionWe have been asked to write the electronic configurations and determine the ions that havenoble-gas configurations.Step 1A point to be noted is that electrons are always removed from the outermost orbital in an atom. Element Atomi Electronic Ion Electronic Noble gas with the same c configuration of configuration electronic configuration numbe atom of the ion as that of ion r 6 2 3+ 5 Ru 44 [Kr]4d 5s Ru [Kr]4d No noble gas with same configuration 10 2 3 3- 10 2 6 As 33 [Kr]3d 4s 4p As [Kr]3d 4s 4p Krypton Y 39 [Kr]4d 5s2 Y3+ [Kr] Krypton Pd 46 [Kr]4d 5s2 Pd2+ [Kr]4d 8 No noble gas with same configuration Pb 82 [Xe]5f 5d 6s 62 Pb2+ [Xe]5f 5d 6s 2 No noble gas with same 2 configuration p Au 79 [Xe]5f 5d 6s 1 Au3+ [Xe]5f 5d 8 No noble gas with same configuration