Gas Mulia
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Gas inert dalam Golongan 18 dengan kulit valensi penuh. Memiliki reaktivitas sangat rendah karena konfigurasi elektronnya yang stabil. Gas mulia tidak berwarna, tidak berbau, dan monoatomik, dengan titik didih yang sangat rendah.
2
Gas
He
Helium
4,0026 u
MP: -272.2 °C
BP: -268.9 °C
10
Gas
Ne
Neon
20,18 u
MP: -248.6 °C
BP: -246.0 °C
18
Gas
Ar
Argon
39,948 u
MP: -189.3 °C
BP: -185.8 °C
36
Gas
Kr
Krypton
83,798 u
MP: -157.4 °C
BP: -153.2 °C
54
Gas
Xe
Xenon
131,29 u
MP: —
BP: —
86
Gas
Rn
Radon
222,0 u
MP: —
BP: —
Tabel Perbandingan
| # | Simbol | Nama | Massa (u) | Titik Lebur | Titik Didih | Kerapatan | Fase |
|---|---|---|---|---|---|---|---|
| 2 | He | Helium | 4,0026 | -272.2 °C | -268.9 °C | 0,0001785 | Gas |
| 10 | Ne | Neon | 20,18 | -248.6 °C | -246.0 °C | 0,0008999 | Gas |
| 18 | Ar | Argon | 39,948 | -189.3 °C | -185.8 °C | 0,0017837 | Gas |
| 36 | Kr | Krypton | 83,798 | -157.4 °C | -153.2 °C | 0,003749 | Gas |
| 54 | Xe | Xenon | 131,29 | — | — | — | Gas |
| 86 | Rn | Radon | 222,0 | — | — | — | Gas |