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==Key Stage 4==
[[File:ArKS4.PNG|right|200px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Argon]].]]
[[File:Argon2dWK.PNG|right|200px|thumb|A 2 dimensional representation of the [[Bohr Model]] of a [[Argon]]-40 [[isotope]] with 18 [[proton]]s and 22 [[neutron]]s in the [[Atomic Nucleus|nucleus]] and 18 2 [[electron]]s orbiting in the first [[Atomic NucleusElectron Orbital|nucleusshell]], 8 in the second and 8 in the [[Outer Shell|outer shell]].]]
===Meaning===
[[Argon]] is a [[Group 0]] [[element]], on the [[Periodic Table]], with 18 [[proton]]s in the [[Atomic Nucleus|nucleus]].