Europium (Eu, Z = 63)
63
Eu
151,964 u
Lanthanide Bloc f Groupe 3 Période 6 Solide (CNTP)
Europium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent of Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water.
Découvreur : Eugène-Anatole Demarçay
Propriétés physiques
- Masse atomique standard
- 152,0 u
- Densité
- 5,264 g/cm³
- Point de fusion
- 1 099,0 K
- Point d'ébullition
- 1 802,0 K
- Chaleur molaire
- 27,66 J·mol⁻¹·K⁻¹
- Électronégativité (Pauling)
- 1,200
- Affinité électronique
- 11,20 kJ/mol
- Énergies d'ionisation
- 547 ; 1 085 ; 2 404 ; 4 120 kJ/mol
- Configuration électronique
- [Xe] 4f7 6s2
- Électrons par couche
- K : 2 · L : 8 · M : 18 · N : 25 · O : 8 · P : 2
Correspondance ANU historique / conjectural
Comptage de la Chimie Occulte (1908) : 2 843 ANU (atomes ultimes), soit N/18 = 157,94 — masse « noologique » à comparer à la masse standard 151,964 u et à l'isotope dominant 153Eu. Coefficient k(Z) = 0,932
Matériel historique et conjectural — voir la page Pont ANU ↔ Nucléides.
Isotopes (41)
| Nucléide | A | N | Masse (u) | Abondance (%) | Demi-vie | Spin | Parité | Magique |
|---|---|---|---|---|---|---|---|---|
| 130Eu | 130 | 67 | 129,964022 | — | 1 ms | 1 | ⁺ | — |
| 131Eu | 131 | 68 | 130,957634 | — | 17.8 ms | 3/2 | ⁺ | — |
| 132Eu | 132 | 69 | 131,954696 | — | — | 1 | ⁺ | — |
| 133Eu | 133 | 70 | 132,949290 | — | — | 5/2 | ⁺ | — |
| 134Eu | 134 | 71 | 133,946537 | — | 500 ms | — | — | |
| 135Eu | 135 | 72 | 134,941870 | — | 1.5 s | 5/2 | ⁺ | — |
| 136Eu | 136 | 73 | 135,939620 | — | 3.3 s | 6 | ⁺ | — |
| 137Eu | 137 | 74 | 136,935431 | — | 8.4 s | 5/2 | ⁺ | — |
| 138Eu | 138 | 75 | 137,933709 | — | — | 6 | ⁻ | — |
| 139Eu | 139 | 76 | 138,929792 | — | 17.9 s | 11/2 | ⁻ | — |
| 140Eu | 140 | 77 | 139,928088 | — | 1.51 s | 1 | ⁺ | — |
| 141Eu | 141 | 78 | 140,924932 | — | 40.7 s | 5/2 | ⁺ | — |
| 142Eu | 142 | 79 | 141,923447 | — | 2.36 s | 1 | ⁺ | — |
| 143Eu | 143 | 80 | 142,920299 | — | 2.59 min | 5/2 | ⁺ | — |
| 144Eu | 144 | 81 | 143,918819 | — | 10.2 s | 1 | ⁺ | — |
| 145Eu | 145 | 82 | 144,916273 | — | 5.93 j | 5/2 | ⁺ | N magique |
| 146Eu | 146 | 83 | 145,917211 | — | 4.61 j | 4 | ⁻ | — |
| 147Eu | 147 | 84 | 146,916752 | — | 24.1 j | 5/2 | ⁺ | — |
| 148Eu | 148 | 85 | 147,918091 | — | 54.5 j | 5 | ⁻ | — |
| 149Eu | 149 | 86 | 148,917937 | — | 93.1 j | 5/2 | ⁺ | — |
| 150Eu | 150 | 87 | 149,919707 | — | 36.9 an | 5 | — | |
| 151Eu | 151 | 88 | 150,919857 | 47,8100 | 4.6 Eyear | 5/2 | ⁺ | — |
| 152Eu | 152 | 89 | 151,921751 | — | 13.517 an | 3 | ⁻ | — |
| 153Eu | 153 | 90 | 152,921237 | 52,1900 | stable | 5/2 | ⁺ | — |
| 154Eu | 154 | 91 | 153,922986 | — | 8.592 an | 3 | ⁻ | — |
| 155Eu | 155 | 92 | 154,922900 | — | 4.742 an | 5/2 | ⁺ | — |
| 156Eu | 156 | 93 | 155,924763 | — | 15.19 j | 0 | ⁺ | — |
| 157Eu | 157 | 94 | 156,925433 | — | 15.18 h | 5/2 | ⁺ | — |
| 158Eu | 158 | 95 | 157,927782 | — | 45.9 min | 1 | — | |
| 159Eu | 159 | 96 | 158,929100 | — | 18.1 min | 5/2 | ⁺ | — |
| 160Eu | 160 | 97 | 159,931837 | — | 42.6 s | 5 | ⁻ | — |
| 161Eu | 161 | 98 | 160,933664 | — | 26.2 s | 5/2 | ⁺ | — |
| 162Eu | 162 | 99 | 161,936958 | — | — | 1 | ⁺ | — |
| 163Eu | 163 | 100 | 162,939266 | — | 7.7 s | 5/2 | ⁺ | — |
| 164Eu | 164 | 101 | 163,942853 | — | 4.16 s | 3 | ⁻ | — |
| 165Eu | 165 | 102 | 164,945540 | — | 2.53 s | 5/2 | ⁺ | — |
| 166Eu | 166 | 103 | 165,949813 | — | 1.24 s | 0 | ⁻ | — |
| 167Eu | 167 | 104 | 166,953011 | — | 1.33 s | 5/2 | ⁺ | — |
| 168Eu | 168 | 105 | 167,957863 | — | 200 ms | 6 | ⁻ | — |
| 169Eu | 169 | 106 | 168,961717 | — | — | 5/2 | ⁺ | — |
| 170Eu | 170 | 107 | 169,966870 | — | stable | — | — |
Liseré coloré en première colonne : vert = stable, jaune = demi-vie > 1 an, orange > 1 jour, rouge < 1 jour.