Determine the element represented by the electron configuration [Kr] 5s² 4d¹⁰ 5p⁶.

The electron configuration [Kr] 5s² 4d¹⁰ 5p⁶ indicates the distribution of electrons in an atom based on its shells and subshells.

To break it down:

• The notation [Kr] represents the electron configuration of krypton, which accounts for the first 36 electrons.

• The additional 5s² means that there are 2 electrons in the 5s subshell, bringing the total to 38.

• The 4d¹⁰ indicates that the 4d subshell is fully filled with 10 electrons, adding up to 48.

• Finally, the 5p⁶ indicates that the 5p subshell is completed with 6 electrons, reaching a total of 54 electrons.

Since the sum of these electrons is 54, the element with this electron configuration is xenon, which has an atomic number of 54. This means that it possesses 54 electrons, aligning perfectly with the configuration provided.

In contrast, the other elements listed have different atomic numbers and corresponding electron configurations, which do not match the specified arrangement.