# Pérak

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

|  |  |
| --- | --- |
| 47 | paladium ← pérak → kadmium |
| Cu ↑ Ag ↓ Au |

|  |
| --- |
| Tabel périodik |

 |

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| Katrangan Umum Unsur |
| Jeneng, Lambang, Nomer atom | pérak, Ag, 47 |
| Dhèrèt kimia | logam transisi |
| Golongan, Période, Blok | 11, 5, d |
| Panampilan | logam putih meling-meling  |
| Massa atom | 107,8682(2) g/mol |
| Konfigurasi elektron | [Kr] 4d10 5s1 |
| Cacahing èlèktron saben kulit | 2, 8, 18, 18, 1 |
| Ciri-ciri fisik |
| Fase | padhet |
| Massa jenis (watara suhu kamar) | 10,49 g/cm³ |
| Massa jenis cair ing titik lebur | 9,320 g/cm³ |
| Titik lebur | 1234,93 K (961,78 °C, 1763,2 °F) |
| Titik umob | 2435 K (2162 °C, 3924 °F) |
| Kalor peleburan | 11,28 kJ/mol |
| Kalor panguapan | 258 kJ/mol |
| Kapasitas kalor | (25 °C) 25,350 J/(mol·K) |
|

Tekanan uap| *P*/Pa | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| ing *T*/K | 1283 | 1413 | 1575 | 1782 | 2055 | 2433 |

 |
| Ciri-ciri atom |
| Struktur kristal | kubus pusat muka |
| Bilangan oksidasi | 1 (oksida amfoter) |
| Elektronegativitas | 1,93 (skala Pauling) |
| Energi ionisasi | pertama: 731,0 kJ/mol |
| ke-2: 2070 kJ/mol |
| ke-3: 3361 kJ/mol |
| Jari-jari atom | 160 pm |
| Jari-jari atom (terhitung) | 165 pm |
| Jari-jari kovalen | 153 pm |
| Jari-jari Van der Waals | 172 pm |
| Lain-lain |
| Sifat magnetik | diamagnetik |
| Resistivitas listrik | (20 °C) 15,87 nΩ·m |
| Konduktivitas termal | (300 K) 429 W/(m·K) |
| Difusivitas termal | (300 K) 174 mm²/s |
| Ekspansi termal | (25 °C) 18,9 µm/(m·K) |
| Kacepetan swara (ing wujud kawat) | (suhu kamar) 2680 m/s |
| Modulus Young | 83 GPa |
| Modulus rigiditas | 30 GPa |
| Modulus ruah | 100 GPa |
| Nisbah Poisson | 0,37 |
| Skala Mohs | 2,5 |
| Kakerasan Vickers | 251 MPa |
| Kekerasan Brinell | 24,5 MPa |
| Isotop |
|

| iso | NA | waktu paruh | DM | DE (MeV) | DP |
| --- | --- | --- | --- | --- | --- |
| 105Ag | syn | 41,2 dina | ε | - | 105Pd |
| γ | 0,344; 0,280; 0,644; 0,443 | - |
| 106mAg | syn | 8,28 dina | ε | - | 106Pd |
| γ | 0,511; 0,717; 1,045; 0,450 | - |
| 107Ag | 51,839% | Ag stabil kanthi 60 neutron |
| 108mAg | syn | 418 taun | ε | - | 108Pd |
| IT | 0,109 | 108Ag |
| γ | 0,433; 0,614; 0,722 | - |
| 109Ag | 48,161% | Ag stabil kanthi 62 neutron |
| 111Ag | syn | 7,45 dina | β- | 1,036; 0,694 | 111Cd |
| γ | 0,342 | - |

 |
| Referensi |

**Pérak** yakuwi sawijining unsur kimia jroning tabel périodik kang nduwèni lambang **Ag** lan nomer atom 47.
 asalé lambangé saka basa Latin *Argentum*. Pérak iku logam transisi empuk, putih, gilap. Pérak duwé konduktivitas listrik lan panas paling dhuwur ing antarané kabèh logam, mineral lan ing wangun bébas. Logam iki bisa dipigunakaké kanggo koin, perhiasan, paralatan meja, lan fotografi.

## Réferènsi

* Los Alamos National Laboratory – Silver Archived 2007-07-02 at the Wayback Machine.

## Pranala njaba

* WebElements.com – Silver
* EnvironmentalChemistry.com – Silver

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| **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 |