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General information about Argon |
| Argon |
| Ar |
| 18 |
| Noble gas |
| 18 |
| 3 |
| p |
| tasteless, odorless, colorless gas |
| 39.948(1) g·mol-1 |
| 1s2 2s2p6 3s2p6 |
| 2, 8, 8 |
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Physical properties of Argon |
| gas |
| (0°C, 101.325 kPa)
1.784 g/L |
| 83.80(K), -189.35°C, -308.83°F |
| 87.30(K), -185.85°C, -302.53°F |
| 83.8058(K), -189°C, 69kPa |
| 150.87(K), 4.898MPa |
| 1.18 kJ·mol-1 |
| 6.43 kJ·mol-1 |
| 20.786 J·mol-1·K-1 |
| ? |
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Atomic structure of Argon |
| 0.88 Å |
| 28.5 cm³/mol |
| 0.98 Å |
| 0.675 |
| Cubic face centered |
| ? |
| 3p6 |
| 18 |
| 22 |
| 18 |
| 0 |
| 3s2p6 |
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Electron dot
model |
Other languages |
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| Latin: |
Argon |
| Czech: |
Argon |
| Croatian: |
Argon |
| French: |
Argon |
| German: |
Argon - r |
| Italian: |
Argo |
| Norwegian: |
Argon |
| Portuguese: |
Argônio |
| Spanish: |
Argón |
| Swedish: |
Argon |
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| Element |
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Brief description |
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Argon has a freezing point of -189.2°C, boiling point of -185.7°C, and density of 1.7837 g/l. Argon is considered to be a noble or inert gas and does not form true chemical compounds, although it does form a hydrate with a dissociation pressure of 105 atm at 0°C. Ion molecules of argon have been observed, including (ArKr)+, (ArXe)+, and (NeAr)+. Argon forms a clathrate with b hydroquinone, which is stable yet without true chemical bonds. Argon is two and a half times more soluble in water than nitrogen, with approximately the same solubility as oxygen. Argon's emission spectrum includes a characteristic set of red lines.
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Uses of Argon |
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Argon is used in electric lights and in fluorescent tubes, photo tubes, glow tubes, and in lasers. Argon is used as an inert gas for welding and cutting, blanketing reactive elements, and as a protective (nonreactive) atmosphere for growing crystals of silicon and germanium.
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Hystory of Argon |
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- Discoverer: William Ramsey, Baron Rayleigh
- Discovery Location: Scotland
- Discovery Year: 1894
- Name Origin: Greek: argos: inactive
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