Indium (In, Z = 49)
Métal pauvre Bloc p Groupe 13 Période 5 Solide (CNTP)
Indium is a chemical element with symbol In and atomic number 49. It is a post-transition metallic element that is rare in Earth's crust. The metal is very soft, malleable and easily fusible, with a melting point higher than sodium, but lower than lithium or tin.
Découvreur : Ferdinand Reich
Propriétés physiques
- Masse atomique standard
- 114,8 u
- Densité
- 7,310 g/cm³
- Point de fusion
- 429,7 K
- Point d'ébullition
- 2 345,0 K
- Chaleur molaire
- 26,74 J·mol⁻¹·K⁻¹
- Électronégativité (Pauling)
- 1,780
- Affinité électronique
- 37,04 kJ/mol
- Énergies d'ionisation
- 558 ; 1 821 ; 2 704 ; 5 210 kJ/mol
- Configuration électronique
- [Kr] 4d10 5s2 5p1
- Électrons par couche
- K : 2 · L : 8 · M : 18 · N : 18 · O : 3
- Aspect
- silvery lustrous gray
Correspondance ANU historique / conjectural
Comptage de la Chimie Occulte (1908) : 2 052 ANU (atomes ultimes), soit N/18 = 114,00 — masse « noologique » à comparer à la masse standard 114,818 u et à l'isotope dominant 113In. Coefficient k(Z) = 0,967 · multiple de 18
Matériel historique et conjectural — voir la page Pont ANU ↔ Nucléides.
Isotopes (42)
| Nucléide | A | N | Masse (u) | Abondance (%) | Demi-vie | Spin | Parité | Magique |
|---|---|---|---|---|---|---|---|---|
| 96In | 96 | 47 | 95,959109 | — | — | — | — | |
| 97In | 97 | 48 | 96,949125 | — | 36 ms | 9/2 | ⁺ | — |
| 98In | 98 | 49 | 97,942129 | — | 30 ms | 0 | ⁺ | — |
| 99In | 99 | 50 | 98,934110 | — | 3.11 s | 9/2 | ⁺ | N magique |
| 100In | 100 | 51 | 99,931102 | — | 5.62 s | 6 | ⁺ | — |
| 101In | 101 | 52 | 100,926414 | — | 15.1 s | 9/2 | ⁺ | — |
| 102In | 102 | 53 | 101,924106 | — | 23.3 s | 6 | ⁺ | — |
| 103In | 103 | 54 | 102,919879 | — | 60 s | 9/2 | ⁺ | — |
| 104In | 104 | 55 | 103,918215 | — | 1.8 min | 5 | ⁺ | — |
| 105In | 105 | 56 | 104,914502 | — | 5.07 min | 9/2 | ⁺ | — |
| 106In | 106 | 57 | 105,913464 | — | 6.2 min | 7 | ⁺ | — |
| 107In | 107 | 58 | 106,910287 | — | 32.4 min | 9/2 | ⁺ | — |
| 108In | 108 | 59 | 107,909694 | — | 58 min | 7 | ⁺ | — |
| 109In | 109 | 60 | 108,907150 | — | 4.159 h | 9/2 | ⁺ | — |
| 110In | 110 | 61 | 109,907171 | — | 4.92 h | 2 | ⁺ | — |
| 111In | 111 | 62 | 110,905107 | — | 2.8048 j | 9/2 | ⁺ | — |
| 112In | 112 | 63 | 111,905539 | — | 14.88 min | 1 | ⁺ | — |
| 113In | 113 | 64 | 112,904060 | 4,2810 | stable | 9/2 | ⁺ | — |
| 114In | 114 | 65 | 113,904916 | — | 71.9 s | 1 | ⁺ | — |
| 115In | 115 | 66 | 114,903879 | 95,7190 | 441 Tyear | 9/2 | ⁺ | — |
| 116In | 116 | 67 | 115,905260 | — | 14.1 s | 1 | ⁺ | — |
| 117In | 117 | 68 | 116,904516 | — | 43.2 min | 9/2 | ⁺ | — |
| 118In | 118 | 69 | 117,906357 | — | 5 s | 1 | ⁺ | — |
| 119In | 119 | 70 | 118,905852 | — | 2.4 min | 9/2 | ⁺ | — |
| 120In | 120 | 71 | 119,907967 | — | 3.08 s | 1 | ⁺ | — |
| 121In | 121 | 72 | 120,907853 | — | 23.1 s | 9/2 | ⁺ | — |
| 122In | 122 | 73 | 121,910282 | — | 1.5 s | 1 | ⁺ | — |
| 123In | 123 | 74 | 122,910435 | — | 6.17 s | 9/2 | ⁺ | — |
| 124In | 124 | 75 | 123,913185 | — | 3.12 s | 3 | ⁺ | — |
| 125In | 125 | 76 | 124,913674 | — | 2.36 s | 9/2 | ⁺ | — |
| 126In | 126 | 77 | 125,916468 | — | 1.53 s | 3 | ⁺ | — |
| 127In | 127 | 78 | 126,917466 | — | 1.086 s | 9/2 | ⁺ | — |
| 128In | 128 | 79 | 127,920354 | — | 816 ms | 3 | — | |
| 129In | 129 | 80 | 128,921809 | — | 570 ms | 9/2 | ⁺ | — |
| 130In | 130 | 81 | 129,924952 | — | 273 ms | 1 | — | |
| 131In | 131 | 82 | 130,926973 | — | 261.5 ms | 9/2 | ⁺ | N magique |
| 132In | 132 | 83 | 131,932998 | — | 202.2 ms | 7 | ⁻ | — |
| 133In | 133 | 84 | 132,938067 | — | 163 ms | 9/2 | ⁺ | — |
| 134In | 134 | 85 | 133,944208 | — | 136 ms | 7 | ⁻ | — |
| 135In | 135 | 86 | 134,949425 | — | 103 ms | 9/2 | ⁺ | — |
| 136In | 136 | 87 | 135,956017 | — | 86 ms | 7 | ⁻ | — |
| 137In | 137 | 88 | 136,961535 | — | 70 ms | 9/2 | ⁺ | — |
Liseré coloré en première colonne : vert = stable, jaune = demi-vie > 1 an, orange > 1 jour, rouge < 1 jour.