4. The "shorthand" electron configuration for bromine, atomic number 35, can be written as. a. [kr]4s4p5 b. [Kr]4s24p53d0 c. [Ar]4s23d04p5 d. [Ar]4s4p5 e. None of the above 5. For the row on the periodic table beginning with sodium, the shell being filled is. a. n=1 b. n=2 c. n=3 d. n=4 e. n=5 6. The building-up principle used to reproduce the electron configuration of the ground states of atoms by filling subshells in a specific order is called (the) a. Aufbau Principle b. Pauli Exclusion Principle c. Heisenberg's Uncertainty Principle d. Hund's Rule e. Orbital Diagram