Which element has the electron configuration [Rn] 7s^2 5f^14 6d^4?

The electron configuration [Rn] 7s^2 5f^14 6d^4 corresponds to an element in the actinide or transactinide series. The notation indicates that the element has filled 5f orbitals (5f^14) and partially filled 6d orbitals (6d^4) along with two electrons in the 7s orbital.

In this configuration:

• The [Rn] indicates that the element follows Radon, a noble gas.

• The 7s^2 denotes that there are two electrons in the 7s subshell, which is characteristic of elements that typically belong to the group of elements that start with the actinides and include the superheavy elements.

• The 5f^14 indicates the presence of fully filled f-orbitals, which are characteristic of the actinides and some transactinides, contributing to the electron count in these heavier elements.

• The 6d^4 signifies that there are four electrons in the 6d subshell, which is consistent with the placement of the element in periodic table groups known for transition metals.

Seaborgium, with the configuration that includes 6d^4, is indeed classified within