What is the correct element for the configuration [Xe] 4f^14 5d^10 6s^2 6p^1?

The given electron configuration is [Xe] 4f^14 5d^10 6s^2 6p^1. To understand which element corresponds to this configuration, we need to analyze the number of electrons that are present.

1. The notation [Xe] represents the core electrons, which account for 54 electrons corresponding to Xenon.

2. The terms 4f^14 and 5d^10 indicate that there are 14 electrons in the 4f subshell and 10 electrons in the 5d subshell.

3. The 6s^2 notation shows there are 2 electrons in the 6s subshell, and 6p^1 indicates there is 1 electron in the 6p subshell.

Adding these together:

• Core electrons from [Xe]: 54

• Electrons in 4f: 14

• Electrons in 5d: 10

• Electrons in 6s: 2

• Electrons in 6p: 1

Total = 54 + 14 + 10 + 2 + 1 = 81 electrons.

The element with an atomic number of 81 on the periodic table is