Final answer:
The noble gas configuration for Br is [Ar]4s²3d¹⁰4p⁵. Therefore, the correct answer is d) Ar.
Step-by-step explanation:
The noble gas configuration for Br (Bromine) is [Ar]4s²3d¹⁰4p⁵.
Since Br is element #35, it has 35 electrons. To find the noble gas configuration, we look at the previous noble gas, which is argon (Ar) with 18 electrons. So, we start with [Ar] and then add the remaining 17 electrons of Br: 4s²3d¹⁰4p⁵.
Therefore, the noble gas (short hand) configuration for Br is d) Ar.