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Argon

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name Argon
latin Argon
french Argon
german Argon
symbol Ar
proton number 18
atomic weight 39.948
Pauling electronegativity -
electronic configuration [Ne] 3s23p6
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melting point 83.8 K, -189.35°C, -308.83°F
boiling point 87.3 K, -185.85°C, -302.53°F
group 18
period 3
state (by 20°C) gas
oxidation states -
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Discoverer

Year of discovery Discoverers
1894 Lord John William Strutt Rayleigh (1842-1919)
Sir William Ramsay (1852-1916)

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