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Line 1: − + − + − '''Symbol:''' Ar+ − + − '''Atomic Number:''' 18 − '''Atomic Mass:''' 39.9 amu+ − + − '''Number of electrons:''' 18 − − '''Classification:''' Non-metal − − '''Crystal structure:''' Cubic − − '''Color:''' Colorless gas − − '''Date of Discovery:''' 1894 − − '''Name of Discoverer:''' [[Sir William Ramsey]] − − '''Name Origin:''' From the Greek ''argon''. − − '''Uses:''' Lighting − − '''Obtained from:''' Air
→References: clean up & uniformity
== Element ==
{{Element | name=Argon | symbol=Ar | anumber=18 | amass=39.9 amu | noe=18 | class=Non-metal | cstructure=Cubic | color=Colorless gas | date=1894 | discname=[[Sir William Ramsey]] | origname=From the Greek ''argon''. | uses=Lighting | obtained=Air }}
'''Name:''' Argon
'''Argon''' ('''Ar''') is the most common of the [[noble gas]]es. It is an inert component which comprises 0.934% of the Earth's [[atmosphere]].<ref>The New American Desk Encyclopedia, Penguin Group, 1989</ref> It is a common shielding agent in welding or melting of metal, preventing reaction and subsequent oxidation of the hot metal with atmospheric air.
==References==
<references />
{{Periodic table}}
[[Category:Elements]]