Uranium electron configuration: [Rn]5f36d17s2

The electron configuration for argon is 1s² 2s² 2p⁶ 3s² 3p⁶. Argon has 18 electrons and is found in the noble gas group, which means it has a stable configuration.

The core electron configuration of sulfur is [Ne] 3s^2 3p^4, where [Ne] represents the electron configuration of the noble gas neon. This indicates that sulfur has a full 3s subshell and 4 electrons in the 3p subshell within its core electron configuration.

The electron configuration of beryllium is 1s2 2s2. When beryllium forms a plus-one ion (beryllium plus), it loses one electron, leading to the electron configuration of 1s2 2s1.

It is 1s22s22p3