Here's how to determine the noble gas notation for Cesium (Cs):

1. Find Cesium on the periodic table. Cesium is in the first column (alkali metals) and has an atomic number of 55.

2. Identify the preceding noble gas. The noble gas that comes before Cesium is Xenon (Xe), which has an atomic number of 54.

3. Determine the remaining electron configuration. Cesium has one more electron than Xenon.

Therefore, the noble gas notation for Cesium is:

[Xe] 6s¹