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===Meaning===
[[File:CaesiumSymbol.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Caesium]].]]
[[Caesium]] is a [[Group 1]] [[element]] , on the [[Periodic Table]], with an [[Atomic Number|atomic number]] of 55.
===About Caesium===
: [[Caesium]] has the [[Chemical Formula|chemical formula]] [[Caesium|Cs]].
==Key Stage 4==
===Meaning===
[[Caesium]] is a [[Group 1]] [[element]] , on the [[Periodic Table]], with 55 [[proton]]s in the [[Atomic Nucleus|nucleus]].
===About Caesium===
: [[Caesium]] has the [[Chemical Formula|chemical formula]] [[Caesium|Cs]].