Palladium (Pd, Z = 46)
Métal de transition Bloc d Groupe 10 Période 5 Solide (CNTP)
Palladium is a chemical element with symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas.
Découvreur : William Hyde Wollaston
Propriétés physiques
- Masse atomique standard
- 106,4 u
- Densité
- 12,02 g/cm³
- Point de fusion
- 1 828,1 K
- Point d'ébullition
- 3 236,0 K
- Chaleur molaire
- 25,98 J·mol⁻¹·K⁻¹
- Électronégativité (Pauling)
- 2,200
- Affinité électronique
- 54,24 kJ/mol
- Énergies d'ionisation
- 804 ; 1 870 ; 3 177 kJ/mol
- Configuration électronique
- [Kr] 4d10
- Électrons par couche
- K : 2 · L : 8 · M : 18 · N : 18
- Aspect
- silvery white
Correspondance ANU historique / conjectural
Comptage de la Chimie Occulte (1908) : 1 904 ANU (atomes ultimes), soit N/18 = 105,78 — masse « noologique » à comparer à la masse standard 106,421 u et à l'isotope dominant 106Pd. Coefficient k(Z) = 0,976
Matériel historique et conjectural — voir la page Pont ANU ↔ Nucléides.
Isotopes (42)
| Nucléide | A | N | Masse (u) | Abondance (%) | Demi-vie | Spin | Parité | Magique |
|---|---|---|---|---|---|---|---|---|
| 90Pd | 90 | 44 | 89,957370 | — | — | 0 | ⁺ | — |
| 91Pd | 91 | 45 | 90,950435 | — | 32 ms | 7/2 | ⁺ | — |
| 92Pd | 92 | 46 | 91,941192 | — | 1.06 s | 0 | ⁺ | — |
| 93Pd | 93 | 47 | 92,936680 | — | 1.17 s | 9/2 | ⁺ | — |
| 94Pd | 94 | 48 | 93,929036 | — | 9.1 s | 0 | ⁺ | — |
| 95Pd | 95 | 49 | 94,924889 | — | 7.4 s | 9/2 | ⁺ | — |
| 96Pd | 96 | 50 | 95,918214 | — | 122 s | 0 | ⁺ | N magique |
| 97Pd | 97 | 51 | 96,916472 | — | 3.1 min | 5/2 | ⁺ | — |
| 98Pd | 98 | 52 | 97,912698 | — | 17.7 min | 0 | ⁺ | — |
| 99Pd | 99 | 53 | 98,911773 | — | 21.4 min | 5/2 | — | |
| 100Pd | 100 | 54 | 99,908520 | — | 3.63 j | 0 | ⁺ | — |
| 101Pd | 101 | 55 | 100,908285 | — | 8.47 h | 5/2 | ⁺ | — |
| 102Pd | 102 | 56 | 101,905632 | 1,0200 | stable | 0 | ⁺ | — |
| 103Pd | 103 | 57 | 102,906111 | — | 16.991 j | 5/2 | ⁺ | — |
| 104Pd | 104 | 58 | 103,904030 | 11,1400 | stable | 0 | ⁺ | — |
| 105Pd | 105 | 59 | 104,905079 | 22,3300 | stable | 5/2 | ⁺ | — |
| 106Pd | 106 | 60 | 105,903480 | 27,3300 | stable | 0 | ⁺ | — |
| 107Pd | 107 | 61 | 106,905128 | — | 6.5 Ma | 5/2 | ⁺ | — |
| 108Pd | 108 | 62 | 107,903892 | 26,4600 | stable | 0 | ⁺ | — |
| 109Pd | 109 | 63 | 108,905951 | — | 13.59 h | 5/2 | ⁺ | — |
| 110Pd | 110 | 64 | 109,905173 | 11,7200 | stable | 0 | ⁺ | — |
| 111Pd | 111 | 65 | 110,907690 | — | 23.56 min | 5/2 | ⁺ | — |
| 112Pd | 112 | 66 | 111,907331 | — | 21.04 h | 0 | ⁺ | — |
| 113Pd | 113 | 67 | 112,910262 | — | 93 s | 5/2 | ⁺ | — |
| 114Pd | 114 | 68 | 113,910369 | — | 2.42 min | 0 | ⁺ | — |
| 115Pd | 115 | 69 | 114,913659 | — | 25 s | 1/2 | — | |
| 116Pd | 116 | 70 | 115,914298 | — | 11.8 s | 0 | ⁺ | — |
| 117Pd | 117 | 71 | 116,917956 | — | 4.3 s | 3/2 | ⁺ | — |
| 118Pd | 118 | 72 | 117,919067 | — | 1.9 s | 0 | ⁺ | — |
| 119Pd | 119 | 73 | 118,923341 | — | 920 ms | 3/2 | ⁺ | — |
| 120Pd | 120 | 74 | 119,924552 | — | 492 ms | 0 | ⁺ | — |
| 121Pd | 121 | 75 | 120,928950 | — | 290 ms | 3/2 | ⁺ | — |
| 122Pd | 122 | 76 | 121,930632 | — | 193 ms | 0 | ⁺ | — |
| 123Pd | 123 | 77 | 122,935126 | — | 108 ms | 3/2 | ⁺ | — |
| 124Pd | 124 | 78 | 123,937305 | — | 88 ms | 0 | ⁺ | — |
| 125Pd | 125 | 79 | 124,942072 | — | 60 ms | 3/2 | ⁺ | — |
| 126Pd | 126 | 80 | 125,944401 | — | 48.6 ms | 0 | ⁺ | — |
| 127Pd | 127 | 81 | 126,949307 | — | 38 ms | 11/2 | ⁻ | — |
| 128Pd | 128 | 82 | 127,952345 | — | 35 ms | 0 | ⁺ | N magique |
| 129Pd | 129 | 83 | 128,959334 | — | 31 ms | 7/2 | ⁻ | — |
| 130Pd | 130 | 84 | 129,964863 | — | — | 0 | ⁺ | — |
| 131Pd | 131 | 85 | 130,972367 | — | — | 7/2 | ⁻ | — |
Liseré coloré en première colonne : vert = stable, jaune = demi-vie > 1 an, orange > 1 jour, rouge < 1 jour.