# Stronsiyum

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| --- | --- | --- | --- | --- | --- |
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|  |  |
| --- | --- |
| 38 | rubidium ← strontium → yttrium |
| Ca ↑ Sr ↓ Ba |

|  |
| --- |
| Tabel périodik |

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| Katrangan Umum Unsur |
| Jeneng, Lambang, Nomer atom | strontium, Sr, 38 |
| Dhèrèt kimia | alkaline earth metals |
| Golongan, Période, Blok | 2, 5, s |
| Panampilan | silvery white metallic  |
| Massa atom | 87.62(1) g/mol |
| Konfigurasi elektron | [Kr] 5s2 |
| Cacahing èlèktron saben kulit | 2, 8, 18, 8, 2 |
| Ciri-ciri fisik |
| Fase | solid |
| Massa jenis (watara suhu kamar) | 2.64 g/cm³ |
| Massa jenis cair ing titik lebur | 6.980 g/cm³ |
| Titik lebur | 1050 K (777 °C, 1431 °F) |
| Titik umob | 1655 K (1382 °C, 2520 °F) |
| Kalor peleburan | 7.43 kJ/mol |
| Kalor panguapan | 136.9 kJ/mol |
| Kapasitas kalor | (25 °C) 26.4 J/(mol·K) |
|

Tekanan uap| *P*/Pa | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| ing *T*/K | 796 | 882 | 990 | 1139 | 1345 | 1646 |

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| Ciri-ciri atom |
| Struktur kristal | cubic face centered |
| Bilangan oksidasi | 2 (strongly basic oxide) |
| Elektronegativitas | 0.95 (skala Pauling) |
| Energi ionisasi (detil) | ke-1: 549.5 kJ/mol |
| ke-2: 1064.2 kJ/mol |
| ke-3: 4138 kJ/mol |
| Jari-jari atom | 200 pm |
| Jari-jari atom (terhitung) | 219 pm |
| Jari-jari kovalen | 192 pm |
| Lain-lain |
| Sifat magnetik | paramagnetic |
| Resistivitas listrik | (20 °C) 132 nΩ·m |
| Konduktivitas termal | (300 K) 35.4 W/(m·K) |
| Ekspansi termal | (25 °C) 22.5 µm/(m·K) |
| Modulus rigiditas | 6.1 GPa |
| Nisbah Poisson | 0.28 |
| Skala Mohs | 1.5 |
| Nomor CAS | 7440-24-6 |
| Isotop |
|

| iso | NA | waktu paruh | DM | DE (MeV) | DP |
| --- | --- | --- | --- | --- | --- |
| 82Sr | syn | 25.36 d | ε | - | 82Rb |
| 83Sr | syn | 1.35 d | ε | - | 83Rb |
| β+ | 1.23 | 83Rb |
| γ | 0.76, 0.36 | - |
| 84Sr | 0.56% | Sr stabil kanthi 46 neutron |
| 85Sr | syn | 64.84 d | ε | - | 85Rb |
| γ | 0.514D | - |
| 86Sr | 9.86% | Sr stabil kanthi 48 neutron |
| 87Sr | 7.0% | Sr stabil kanthi 49 neutron |
| 88Sr | 82.58% | Sr stabil kanthi 50 neutron |
| 89Sr | syn | 50.52 d | ε | 1.49 | 89Y |
| β- | 0.909D | - |
| 90Sr | syn | 28.90 y | β- | 0.546 | 90Y |

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| Referensi |

**Strontium** yakuwi sawijining unsur kimia jroning tabel périodik kang nduwèni lambang **Sr** lan nomer atom 38.

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| **Golongan** → | **1** | **2** |  | **3** | **4** | **5** | **6** | **7** | **8** | **9** | **10** | **11** | **12** | **13** | **14** | **15** | **16** | **17** | **18** |
| **Période** ↓ |  |
| **1** | 1 H |  | 2 He |
| **2** | 3 Li | 4 Be |  |  | 5 B | 6 C | 7 N | 8 O | 9 F | 10 Ne |
| **3** | 11 Na | 12 Mg |  |  | 13 Al | 14 Si | 15 P | 16 S | 17 Cl | 18 Ar |
| **4** | 19 K | 20 Ca |  | 21 Sc | 22 Ti | 23 V | 24 Cr | 25 Mn | 26 Fe | 27 Co | 28 Ni | 29 Cu | 30 Zn | 31 Ga | 32 Ge | 33 As | 34 Se | 35 Br | 36 Kr |
| **5** | 37 Rb | 38 Sr |  | 39 Y | 40 Zr | 41 Nb | 42 Mo | 43 Tc | 44 Ru | 45 Rh | 46 Pd | 47 Ag | 48 Cd | 49 In | 50 Sn | 51 Sb | 52 Te | 53 I | 54 Xe |
| **6** | 55 Cs | 56 Ba | \*  | 71 Lu | 72 Hf | 73 Ta | 74 W | 75 Re | 76 Os | 77 Ir | 78 Pt | 79 Au | 80 Hg | 81 Tl | 82 Pb | 83 Bi | 84 Po | 85 At | 86 Rn |
| **7** | 87  Fr  | 88 Ra | \*\*  | 103 Lr | 104 Rf | 105 Db | 106 Sg | 107 Bh | 108 Hs | 109 Mt | 110 Ds | 111 Rg | 112 Cn | 113 Nh | 114 Fl | 115 Mc | 116 Lv | 117 Ts | 118 Og |
|  |
| \* **Lantanida** | 57 La | 58 Ce | 59 Pr | 60 Nd | 61 Pm | 62 Sm | 63 Eu | 64 Gd | 65 Tb | 66 Dy | 67 Ho | 68 Er | 69 Tm | 70 Yb |
| \*\* **Aktinida** | 89 Ac | 90 Th | 91 Pa | 92 U | 93 Np | 94 Pu | 95 Am | 96 Cm | 97 Bk | 98 Cf | 99 Es | 100 Fm | 101 Md | 102 No |

Seri Kimia saka Tabel Périodik| Logam alkali | Alkali tanah | Lantanida | Aktinida | Logam transisi |
| Logam | Metaloid | Nonlogam | Halogen | Gas mulia |