What element corresponds to the configuration [Xe] 6s² 4f⁷?

The electron configuration [Xe] 6s² 4f⁷ indicates that the element in question is in the actinide series and has a total of 7 electrons in the 4f subshell, following the xenon core. The notation [Xe] represents the electron configuration of xenon, which accounts for the first 54 electrons. The additional 2 electrons in the 6s subshell and 7 electrons in the 4f subshell sum to a total of 63 electrons, which corresponds to the element Europium.

Europium is known for its placement in the f-block of the periodic table, specifically within the lanthanides, making it a critical element for various applications, including phosphorescent materials. The specific configuration reveals it has completed the 6s subshell and has 7 out of the 14 possible electrons in the 4f subshell, confirming that it is indeed Europium. Other elements listed either do not match the number of electrons in the 4f subshell or are positioned incorrectly on the periodic table, thereby making the identification of Europium accurate.