Orbital Diagram of Rubidium

How to write the Orbital Diagram for Rubidium?

Rubidium (Rb) has 37 electrons buzzing around its nucleus. Imagine these electrons occupying shells like layers. Unlike zinc, rubidium doesn’t have any deeply hidden stashes of electrons. Instead, its configuration can be pictured as 2 in the innermost shell, 8 in the second, 18 in the third, and finally, just 1 lone electron venturing out in the outermost shell. This single outer electron makes rubidium highly reactive, eager to interact with other elements by forming bonds.

Image Showing Orbital Diagram of Rubidium
Orbital Diagram of Rubidium