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: [[Protactinium]] is [[ductile]].
==Key Stage 4==
[[File:PaKS4.PNG|right|200px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Protactinium]].]]
===Meaning===
[[Protactinium]] is a [[Actinide]] [[metal]] [[element]], on the [[Periodic Table]], with 91 [[proton]]s in the [[Atomic Nucleus|nucleus]].