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==Key Stage 4==
[[File:AtKS4.PNG|right|200px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Astatine]].]]
===Meaning===
[[Astatine]] is a [[Group 7]] [[metalloid]] [[element]], on the [[Periodic Table]], with 85 [[proton]]s in the [[Atomic Nucleus|nucleus]].
: [[Astatine]] is a [[metalloid]] [[element]] so in some conditions it is an [[Electrical Conductor|electrical conductor]].
: [[Astatine]] is the least [[Reactivity|reactive]] [[Halogen]].
: [[Astatine]] is a mild [[bleach]]ing agent.
: [[Astatine]] kills [[bacteria]].
: [[Astatine]] is a shiny [[solid]] at [[STP|standard temperature and pressure]] and has a high [[Melting Point|melting point]].