2.3: Electronic Configuration Worksheet

1. Which of the following is the orbital diagram of N3-? 2. Choose the species that has the same electronic configuration as neon (Z = 10). 02- Al C CI 3. Which of the following defines the Pauli exclusion principle? When electrons are filled into orbitals with equivalent energy, the electrons occupy each orbital singly before they occupy the orbitals in pairs. An orbital can hold a maximum of two electrons with different quantum numbers. Electrons occupy the orbital with the lowest energy first before they occupy orbitals with higher energy. Half-filled orbitals contribute to the stability of an atom. 4. Which of the following represents the configuration of the electrons with the highest energy in a Group 14 element? 3p4 3s2 3p2 4s2 3d4 4s23d14p1 5. For which of the following pairs of atoms do both atoms contain only three unpaired electrons in their d orbitals? Ti and V Ti and Co V and Cr V and Co 6. Which of the following is the electronic configuration of an atom represented by 29Y? 1s22s22p63s23p63d6 1s22s22p63s23p63d104s1 1s22s22p63s23p63d44s2 1s22s22p63s23p63d104s24p64d104f6 7. Which statement about copper is INCORRECT? The electronic configuration of Cu+is 1s22s22p63s23p63d10. The electronic configuration of Cu²+ is 1s22s22p63s23p63d9. The electronic configuration of copper is 1s22s22p63s23p64s13d10. The electronic configuration of copper is 1s22s22p63s23p64s23d9. 8. Which of the following species contains paired electrons in 3d orbitals? Fe3+ Cu Al3+ Mn 9. Choose the orbital diagram which does NOT OBEY the Pauli Exclusion Principle? 10. Which of the following electron distributions is impossible?