The condensed electron configuration for Cs (Cesium) using the appropriate noble gas core abbreviation is:

[Xe] 6s¹

Here's why:

* [Xe] represents the electron configuration of Xenon, the noble gas that comes before Cesium on the periodic table. This is a shorthand way of writing the complete configuration for Xenon's electrons.

* 6s¹ represents the single valence electron in Cesium's outermost shell, which is the 6th energy level and the 's' subshell.