In which subshell would you find an electron with the highest energy level in a 4p orbital?

In a 4p orbital, the electrons present are part of the principal energy level 4 and belong specifically to the p subshell. The energy levels of electrons are influenced by both their principal quantum number and the type of subshell they occupy (s, p, d, or f).

Electrons in the p subshell are generally at a higher energy than those in the s or d subshells of the same principal level. In this case, since the question specifically asks about electrons in the 4p orbital, these electrons have the highest energy level when compared to the electrons in lower principal energy levels and other subshells within the same principal level.

While it might seem that the 5s orbital could contain higher energy electrons, this is not considered within the context of the 4p orbital itself. The focus here is specifically on the 4p orbital, which indeed houses the highest energy electrons at the 4th principal level among the provided options. Thus, the identification of the 4p orbital as hosting the highest energy electrons in this scenario is accurate, illustrating an essential understanding of the order of subshell energy levels.