Alkali Metal
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Periyodik tablonun 1. grubundaki yüksek reaktiviteli metaller. Bir değerlik elektronu vardır ve kolayca +1 katyonları oluştururlar. Bu yumuşak, gümüşi renkli metaller su ile şiddetle tepkimeye girer ve doğada hiçbir zaman serbest element olarak bulunmazlar.
3
Solid
Li
Lithium
6,941 u
MP: 180.5 °C
BP: 1329.8 °C
11
Solid
Na
Sodium
22,99 u
MP: 97.8 °C
BP: 882.9 °C
19
Solid
K
Potassium
39,098 u
MP: 63.6 °C
BP: 758.9 °C
37
Solid
Rb
Rubidium
85,468 u
MP: —
BP: —
55
Solid
Cs
Cesium
132,91 u
MP: —
BP: —
87
Solid
Fr
Francium
223,0 u
MP: —
BP: —
Karşılaştırma Tablosu
| # | Sembol | Ad | Kütle (u) | Erime Nk. | Kaynama Nk. | Yoğunluk | Faz |
|---|---|---|---|---|---|---|---|
| 3 | Li | Lithium | 6,941 | 180.5 °C | 1329.8 °C | 0,534 | Solid |
| 11 | Na | Sodium | 22,99 | 97.8 °C | 882.9 °C | 0,971 | Solid |
| 19 | K | Potassium | 39,098 | 63.6 °C | 758.9 °C | 0,862 | Solid |
| 37 | Rb | Rubidium | 85,468 | — | — | — | Solid |
| 55 | Cs | Cesium | 132,91 | — | — | — | Solid |
| 87 | Fr | Francium | 223,0 | — | — | — | Solid |