What is the chemical symbol for the element with the configuration [Rn] 7s² 5f¹⁰?

The correct response to the question regarding the chemical symbol for the element with the electron configuration [Rn] 7s² 5f¹⁰ is Americium (Am).

To understand why this is the case, we need to analyze the given electron configuration. This configuration indicates that the element has a filled radon core ([Rn]), which accounts for the first 86 electrons. The subsequent electrons have occupied the 7s subshell with 2 electrons and the 5f subshell with 10 electrons.

The 5f block of elements corresponds to the actinides on the periodic table, which include elements like americium. Specifically, knowing that Americium's atomic number is 95, we can confirm that the total count from the configuration aligns with this: starting from radon (86) and adding the 2 electrons from the 7s and 10 from the 5f gives a total of 98, indicating an error in calculation since Americium is indeed ([Rn] 7s^2 5f^7). However, if you consider 5f¹⁰, you land at elements further along the actinide series.

In this case,