Cesium

Cesium is a soft, golden alkali metal known for its high reactivity and use in atomic clocks.

Atomic Structure

cesium atom electronic configuration

Atomic Information

Property	Value
Atomic Number	55
Symbol	Cs
Atomic Mass	132.91 u
Electron Configuration	1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 6s¹
State at Room Temperature	Solid

Uses of Cesium

Used in atomic clocks, which are the most accurate timekeeping devices.
Used in oil exploration as a drilling fluid additive.
Used in photoelectric cells and ion propulsion systems.