Determine the element of lowest atomic number that contains a complete d subshell in the ground state.?

NetherCraft 0

3 Answers

  • 1s2 2s2 2p6 3s2 3p6 4s2 3d10

    Total number of electrons = 30

    Element with atomic number of 30 = zinc

  • It is element 29 Copper: [Ar] 3d^10 4s^1 that it is not [Ar] 3d^9 4s^2 is attributed to the”extra stability of a completely filled d shell.” It is also now thought that 3d should come before 4s in energy. The higher energy 4s AO is occupied first because it minimizes the electron-electron repulsions with core electrons. RH panel agrees with the configuration given

    I am not sure how you would determine the configuration; Cu is an exception to the rule.

  • Thanks!

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