argon

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argon
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UFP Historical Society
Symbol Ar
Atomic Weight 39.948
Atomic Number 18
Discovered 1894
First Appearance TOS 13 (5 Jan 1967)
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Argon, element 18, was discovered in Scotland on Earth in 1894.[1] The planetoid Gamma Canaris N had trace amounts of argon in its atmosphere.[2]

Notes and References