Periodic table (1)
Transcript of Periodic table (1)
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Periodic Table- Noble Gases -
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Noble Gases
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• Fairly nonreactive• Complete valence shell• High ionization energies• Very low electronegativities• Low boiling points (all gases at room temperature)
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Atomic Radius
Boiling Point
Melting Point
He 1.400 -268.6 -272.0Ne 1.540 -246.1 -248.6Ar 1.880 -186.0 -189.3Kr 2.020 -153.4 -157.2Xe 2.160 -108.1 -111.9Rn 2.200 -61.8 -71.0 He Ne Ar Kr Xe Rn
0.000
0.500
1.000
1.500
2.000
2.500Atomic Radius
He Ne Ar Kr Xe Rn
-300.0
-250.0
-200.0
-150.0
-100.0
-50.0
0.0Boiling Point
He Ne Ar Kr Xe Rn
-300.0
-250.0
-200.0
-150.0
-100.0
-50.0
0.0
Melting Point
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Uses
He Balloons, Deep Sea Diving
Ne Liquid Air
Ar Lighting
Kr Lighting
Xe Powerful Lamps, Bubble Chambers
Rn Treatment of Cancer
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Abundance in Earth’s Crust (mg/kg)
He 8 x 10^-3
Ne 5 x 10^-3
Ar 3.5
Kr 1 x 10^-4
Xe 3 x 10^-3
Rn 4 x 10^-13
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