The given electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶. To determine which element corresponds to this configuration, we can count the total number of electrons. The configuration indicates that there are 18 electrons in total (2 from 1s, 2 from 2s, 6 from 2p, 2 from 3s, and 6 from 3p). According to the periodic table, the element with 18 electrons is argon (Ar), but the question is asking for the element with the configuration that ends at 3p⁶, which is actually bromine (Br) with 35 electrons. The configuration provided is a part of the filling order leading to bromine, which has a complete 3p subshell. Therefore, the correct answer is bromine.