Worksheet: Energies of Atomic Orbitals
In this worksheet, we will practice predicting the effects of shielding, nuclear charge, and orbital occupancy on the relative energies of atomic orbitals.
Which of the following statements is false?
- AThe energy difference between the 3d and 4s subshells is sometimes less than the pairing energy of the 4s subshell.
- BElectrons fill subshells of equal in order of increasing .
- CElectrons are usually removed from the 4s subshell before the 3d subshell.
- DElectrons fill subshells in order of increasing .
- EElectrons are usually added to the 4s subshell before the 3d subshell.
Atoms of , , , , and contain one electron in the 6d subshell and two electrons in the 7s subshell. A 6d0 configuration is produced if the d electron is promoted to a 5f or higher energy orbital. In which of these atoms does changing from a 6d1 to a 6d0 configuration produce the greatest increase in pairing energy?
In the experimentally observed values for the 2p elements, we find that the increase in the for a 2p electron is slightly smaller between and () than between and (). Which of the following is not a reason for the differences in the values?
- AThe value for oxygen is raised due to additional shielding from fluorine.
- BMoving from to adds an electron to an unoccupied orbital.
- CMoving from to pairs two electrons in a single orbital.
- DThe value decreases with an increase in electron repulsion.