Logam Alkali Tanah
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Logam reaktif dalam Golongan 2 tabel periodik. Memiliki dua elektron valensi dan membentuk kation +2. Logam berwarna perak-putih mengkilap ini kurang reaktif dibanding logam alkali, tetapi masih terlalu reaktif untuk ditemukan bebas di alam.
4
Solid
Be
Beryllium
9,0122 u
MP: 1286.8 °C
BP: 2468.8 °C
12
Solid
Mg
Magnesium
24,305 u
MP: 649.9 °C
BP: 1089.8 °C
20
Solid
Ca
Calcium
40,078 u
MP: 841.9 °C
BP: 1483.8 °C
38
Solid
Sr
Strontium
87,62 u
MP: —
BP: —
56
Solid
Ba
Barium
137,33 u
MP: —
BP: —
88
Solid
Ra
Radium
226,0 u
MP: —
BP: —
Tabel Perbandingan
| # | Simbol | Nama | Massa (u) | Titik Lebur | Titik Didih | Kerapatan | Fase |
|---|---|---|---|---|---|---|---|
| 4 | Be | Beryllium | 9,0122 | 1286.8 °C | 2468.8 °C | 1,85 | Solid |
| 12 | Mg | Magnesium | 24,305 | 649.9 °C | 1089.8 °C | 1,738 | Solid |
| 20 | Ca | Calcium | 40,078 | 841.9 °C | 1483.8 °C | 1,55 | Solid |
| 38 | Sr | Strontium | 87,62 | — | — | — | Solid |
| 56 | Ba | Barium | 137,33 | — | — | — | Solid |
| 88 | Ra | Radium | 226,0 | — | — | — | Solid |