# Strontium

Strontium, 38Sr|  |
| Strontium sĕtronsiyum· |
| Pabaosan | /ˈstrɒnʃiəm, -tiəm/ ​(*STRON-shee-əm, -⁠tee-əm*) |
| Cingakan | métalik petak kapérakan; antuk warna kuning lémlém |
| Bobot atom standar *A*r, std(Sr) | 7001876200000000000♠87.62(1) |
| Strontium ring tabél périodik |
|

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|

|  |  |  |
| --- | --- | --- |
| Hidrogén |  | Hélium |
| Litium | Bérilium |  | Boron | Karbon | Nitrogén | Oksigén | Fluorin | Néon |
| Natrium | Magnésium |  | Aluminium | Silikon | Phosfor | Urirang | Klorin | Argon |
| Potasium | Kalsium |  | Skandium | Titanium | Vanadium | Kromium | Mangan (datu) | Wesi | Kobalt | Nikel | Temaga | Séng | Gallium | Gérmanium | Arsenik | Sélénium | Brom | Kripton |
| Rubidium | Strontium |  |  | Ittrium | Zirkonium | Niobium | Molibdénum | Téknésium | Ruthénium | Rhodium | Palladium | Pérak | Kadmium | Indium | Timah | Antimoni | Téllurium | Yodium | Xénon |
| Sésium | Barium | Lanthanum | Sérium | Praséodimium | Néodimium | Prométhium | Samarium | Éuropium | Gadolinium | Terbium | Disprosium | Holmium | Érbium | Thulium | Itterbium | Lutésium | Hafnium | Tantalum | Tungstén | Rhénium | Osmium | Iridium | Platinum | Mas | Rasa (datu) | Thallium | Timbal | Bismuth | Polonium | Astatin | Radon |
| Fransium | Radium | Aktinium | Thorium | Protaktinium | Uranium | Néptunium | Plutonium | Amérisium | Curium | Berkélium | Kalifornium | Éinsteinium | Fermium | Méndelevium | Nobélium | Lawrénsium | Rutherfordium | Dubnium | Seaborgium | Bohrium | Hassium | Meitnérium | Darmstadtium | Roéntgénium | Kopernikium | Nihonium | Flérovium | Moskovium | Livermorium | Ténnessin | Oganésson |

 | Ca ↑ **Sr** ↓ Ba |
| rubidium ← **strontium** → ittrium |

 |

 |
| Wilangan atom (*Z*) | 38 |
| Watek | golongan 2 (logam alkali tanah) |
| Période | période 5 |
| Blok |   blok-s  |
| Konpigurasi éléktron | [Kr] 5s2 |
| Éléktron per kulit | 2, 8, 18, 8, 2 |
| Cecirén pisik |
| Pase ring STP | padet |
| Titik lebur | 1050 K ​(777 °C, ​1431 °F)  |
| Titik didih | 1650 K ​(1377 °C, ​2511 °F)  |
| Kapadetan (nampek s.r.) | 2.64 g/cm3 |
| ri kala éncéh (ring t.l.) | 2.375 g/cm3  |
| Panes fusi | 7.43 kJ/mol  |
| Panes panguapan | 141 kJ/mol  |
| Kapasitas panes molar | 26.4 J/(mol·K)  |
| Tekanan uap

| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| --- | --- | --- | --- | --- | --- | --- |
| at T (K) | 796 | 882 | 990 | 1139 | 1345 | 1646 |

 |
| Cecirén atom |
| Paindikan oksidasi | +1, **+2** (oksida basa kuat) |
| Kaéléktronégatipan | skala Pauling: 0.95  |
| Wasa ionisasi | * ka-1: 549.5 kJ/mol
* ka-2: 1064.2 kJ/mol
* ka-3: 4138 kJ/mol
*
 |
| Jeriji atom | émpiris: 215 pm  |
| Jeriji kovalén | 195±10 pm  |
| Jeriji Van der Waals | 249 pm  |
| **Garis spéktral saking strontium** |
| Cecirén liyanan |
| Rupa alami | primordial |
| Struktur kristal |  ​kubus mapusat muka (fcc) |
| Ékspansi térmal | 22.5 µm/(m⋅K) (ring 25 °C)  |
| Konduktivitas térmal | 35.4 W/(m⋅K)  |
| Resistivitas listrik | 132 nΩ⋅m (ring 20 °C)  |
| bacakan magnétik | paramagnétik  |
| Karentanan magnétik molar | 3004080000000000000♠−92.0×10−6 cm3/mol (298 K) |
| Modulus Young | 15.7 GPa  |
| Modulus Shear | 6.03 GPa  |
| Rasio Poisson | 0.28  |
| Kakatosan Mohs | 1.5  |
| Nomor CAS | 7440-24-6  |
| Lelintihan |
| Pangaranan | mawit mineral strontianite, punika mawit saking Strontian, Skotlandia |
| Panemuan | William Cruickshank (1787) |
| Isolasi kapertama | Humphry Davy (1808) |
| Isotop utama strontium |
|

| Iso­top | Kalimpahan | Paruh-idup (*t*1/2) | Mode paluruhan | Pro­duk |
| --- | --- | --- | --- | --- |
| 82Sr | syn | 25.36 d | ε | 82Rb |
| 83Sr | syn | 1.35 d | ε | 83Rb |
| β+ | 83Rb |
| radiasi gammaγ | – |
| 84Sr | 0.56% | tegteg |
| 85Sr | syn | 64.84 d | ε | 85Rb |
| γ | – |
| 86Sr | 9.86% | tegteg |
| 87Sr | 7.00% | tegteg |
| 88Sr | 82.58% | tegteg |
| 89Sr | syn | 50.52 d | ε | 89Rb |
| β− | 89Y |
| 90Sr | jejak | 28.90 y | β− | 90Y |

 |
|

**Strontium** silih tunggil datu kimia dengan simbol **Sr** miwah wilangan atom 38. Rumasuk logam alkali tanah, strontium punika datu logam mawarna putih-pérak-putih masawang kuning sané sanget réaktip sacara kimiawi.

## Pustaka