Caesium
element
Cs
One of the softest metals on Earth — liquid at just above room temperature
Caesium is so reactive it ignites on contact with water — yet its atomic clock defines the very second you're reading this.
Caesium (Cs) - a alkali metal, painted as an original watercolour derived from its place in the periodic table.
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Crystallography
| Catalogue identity | Caesium — (space group unrecorded) |
| Formula | Cs |
| Element | Cs (Z = 55) |