Argon
Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
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| Ìfarahàn |
colorless gas with blue emission
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| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
argon, Ar, 18 |
| Ẹ̀ka apilẹ̀sẹ̀ |
noble gases |
| Àdìpọ̀, ìgbà, block |
18, 3, p |
| Ìwúwo átọ́mù |
39.948(1) g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Ne] 3s2 3p6 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2, 8, 8 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
gas |
| Kíki |
(0 °C, 101.325 kPa)
1.784 g/L |
| ojúàmì ìyọ́ |
83.80 K, −189.35 °C, −308.83 °F |
| ajúàmì ìhó |
87.30 K, −185.85 °C, −302.53 °F |
| Triple point |
83.8058 K (-189°C), 69 kPa |
| Critical point |
150.87 K, 4.898 MPa |
| Heat of fusion |
1.18 kJ·mol−1 |
| Heat of vaporization |
6.43 kJ·mol−1 |
| Specific heat capacity |
(25 °C) 20.786 J·mol−1·K−1 |
| Vapor pressure |
| P/Pa |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T/K |
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47 |
53 |
61 |
71 |
87 |
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| Atomic properties |
| Oxidation states |
0 |
| Electronegativity |
no data (Pauling scale) |
Ionization energies
(more) |
1st: 1520.6 kJ·mol−1 |
| 2nd: 2665.8 kJ·mol−1 |
| 3rd: 3931 kJ·mol−1 |
| Covalent radius |
106±10 pm |
| Van der Waals radius |
188 pm |
| Miscellanea |
| Crystal structure |
face-centered cubic |
| Magnetic ordering |
diamagnetic[1] |
| Thermal conductivity |
(300 K) 17.72x10-3 W·m−1·K−1 |
| Speed of sound |
(gas, 27 °C) 323 m/s |
| CAS registry number |
7440–37–1 |
| Most stable isotopes |
| Main article: Isotopes of argon |
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