# Boron

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

|  |  |
| --- | --- |
| 5 | Bèriliyum ← Boron → Karbon |
| - ↑ B ↓ Al |

|  |
| --- |
| Tabel périodik |

 |

 |
| Katrangan Umum Unsur |
| Jeneng, Lambang, Nomer atom | Boron, B, 5 |
| Dhèrèt kimia | Metaloid |
| Golongan, Période, Blok | 13, 2, p |
| Panampilan | ireng/soklat  |
| Massa atom | 10.811(7) g/mol |
| Konfigurasi elektron | 1s2 2s2 2p1 |
| Cacahing èlèktron saben kulit | 2, 3 |
| Ciri-ciri fisik |
| Fase | padat |
| Massa jenis (watara suhu kamar) | 2.34 g/cm³ |
| Massa jenis cair ing titik lebur | 2.08 g/cm³ |
| Titik lebur | 2349 K (2076 °C, 3769 °F) |
| Titik umob | 4200 K (3927 °C, 7101 °F) |
| Kalor peleburan | 50.2 kJ/mol |
| Kalor panguapan | 480 kJ/mol |
| Kapasitas kalor | (25 °C) 11.087 J/(mol·K) |
|

Tekanan uap| *P*/Pa | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| ing *T*/K | 2348 | 2562 | 2822 | 3141 | 3545 | 4072 |

 |
| Ciri-ciri atom |
| Struktur kristal | rhombohedral |
| Bilangan oksidasi | 3 (asem beroksida ringan) |
| Elektronegativitas | 2.04 (skala Pauling) |
| Energi ionisasi (detil) | ke-1: 800.6 kJ/mol |
| ke-2: 2427.1 kJ/mol |
| ke-3: 3659.7 kJ/mol |
| Jari-jari atom | 85 pm |
| Jari-jari atom (terhitung) | 87 pm |
| Jari-jari kovalen | 82 pm |
| Lain-lain |
| Sifat magnetik | nonmagnetic |
| Resistivitas listrik | (20 °C) 1.5×104 Ω·m |
| Konduktivitas termal | (300 K) 27.4 W/(m·K) |
| Ekspansi termal | (25 °C) 5–7 µm/(m·K) |
| Kecepatan suara (pada wujud kawat) | (20 °C) 16200 m/s |
| Modulus ruah | (β form) 185 GPa |
| Skala Mohs | 9.3 |
| Kakerasan Vickers | 49000 MPa |
| Nomor CAS | 7440-42-8 |
| Isotop |
|

| iso | NA | waktu paruh | DM | DE (MeV) | DP |
| --- | --- | --- | --- | --- | --- |
| 10B | 19.9%\* | B stabil kanthi 5 neutron |
| 11B | 80.1%\* | B stabil kanthi 6 neutron |
| \*Dari cuplikan di alam, daya tampung Boron-10 mungkin paling cendhèk 19.1% paling tinggi sakiwa-tengené 20.3%. Boron-11 in such cases.merupkan salah satu sisanya. |

 |
| Referensi |

Boron
**Boron** yakuwi sawijining unsur kimia jroning tabel périodik kang nduwèni lambang **B** lan nomer atom 5.
 Elemen metaloid trivalen, boron akèh tinemu ing watu borax. Ana loro alotrop boron; boron amorfus yaiku serbuk soklat, nanging boron metalik awarna ireng. Wangun metaliké atos (9,3 sajeroning skala Moh) lan konduktor kang ala sajeroning suhu ruang. Ora tau tinemu bébas sajeroning alam.

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