TΦ Tables Physico-Chimiques

Molybdène (Mo, Z = 42)

42 Mo 95,951 u

Métal de transition Bloc d Groupe 6 Période 5 Solide (CNTP)

Molybdenum is a chemical element with symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts of other metals) in 1778 by Carl Wilhelm Scheele.

Découvreur : Carl Wilhelm Scheele

Propriétés physiques

Masse atomique standard
95,95 u
Densité
10,28 g/cm³
Point de fusion
2 896,0 K
Point d'ébullition
4 912,0 K
Chaleur molaire
24,06 J·mol⁻¹·K⁻¹
Électronégativité (Pauling)
2,160
Affinité électronique
72,10 kJ/mol
Énergies d'ionisation
684 ; 1 560 ; 2 618 ; 4 480 kJ/mol
Configuration électronique
[Kr] 4d5 5s1
Électrons par couche
K : 2 · L : 8 · M : 18 · N : 13 · O : 1
Aspect
gray metallic

Correspondance ANU historique / conjectural

Comptage de la Chimie Occulte (1908) : 1 746 ANU (atomes ultimes), soit N/18 = 97,00 — masse « noologique » à comparer à la masse standard 95,951 u et à l'isotope dominant 98Mo. Coefficient k(Z) = 0,988 · multiple de 18

Matériel historique et conjectural — voir la page Pont ANU ↔ Nucléides.

Isotopes (39)

NucléideANMasse (u) Abondance (%)Demi-vieSpinParitéMagique
81Mo 81 39 80,966226 — — 5/2 ⁺ —
82Mo 82 40 81,956661 — — 0 ⁺ —
83Mo 83 41 82,950252 — 23 ms 3/2 ⁻ —
84Mo 84 42 83,941846 — 2.3 s 0 ⁺ —
85Mo 85 43 84,938261 — 3.2 s 1/2 ⁺ —
86Mo 86 44 85,931174 — 19.1 s 0 ⁺ —
87Mo 87 45 86,928196 — 14.1 s 7/2 ⁺ —
88Mo 88 46 87,921968 — 8 min 0 ⁺ —
89Mo 89 47 88,919468 — 2.11 min 9/2 ⁺ —
90Mo 90 48 89,913931 — 5.56 h 0 ⁺ —
91Mo 91 49 90,911745 — 15.49 min 9/2 ⁺ —
92Mo 92 50 91,906807 14,6490 stable 0 ⁺ N magique
93Mo 93 51 92,906809 — 4 ka 5/2 ⁺ —
94Mo 94 52 93,905084 9,1870 stable 0 ⁺ —
95Mo 95 53 94,905837 15,8730 stable 5/2 ⁺ —
96Mo 96 54 95,904675 16,6730 stable 0 ⁺ —
97Mo 97 55 96,906017 9,5820 stable 5/2 ⁺ —
98Mo 98 56 97,905404 24,2920 stable 0 ⁺ —
99Mo 99 57 98,907707 — 65.932 h 1/2 ⁺ —
100Mo 100 58 99,907468 9,7440 7.07 Eyear 0 ⁺ —
101Mo 101 59 100,910338 — 14.61 min 1/2 ⁺ —
102Mo 102 60 101,910294 — 11.3 min 0 ⁺ —
103Mo 103 61 102,913092 — 67.5 s 3/2 ⁺ —
104Mo 104 62 103,913747 — 60 s 0 ⁺ —
105Mo 105 63 104,916982 — 36.3 s 5/2 ⁻ —
106Mo 106 64 105,918273 — 8.73 s 0 ⁺ —
107Mo 107 65 106,922120 — 3.5 s 1/2 ⁺ —
108Mo 108 66 107,924048 — 1.105 s 0 ⁺ —
109Mo 109 67 108,928438 — 700 ms 1/2 ⁺ —
110Mo 110 68 109,930718 — 292 ms 0 ⁺ —
111Mo 111 69 110,935652 — 193.6 ms 1/2 ⁺ —
112Mo 112 70 111,938293 — 125 ms 0 ⁺ —
113Mo 113 71 112,943478 — 80 ms 5/2 ⁺ —
114Mo 114 72 113,946666 — 58 ms 0 ⁺ —
115Mo 115 73 114,952174 — 45.5 ms 3/2 ⁺ —
116Mo 116 74 115,955759 — 32 ms 0 ⁺ —
117Mo 117 75 116,961686 — 22 ms 3/2 ⁺ —
118Mo 118 76 117,965249 — 21 ms 0 ⁺ —
119Mo 119 77 118,971465 — — 3/2 ⁺ —

Liseré coloré en première colonne : vert = stable, jaune = demi-vie > 1 an, orange > 1 jour, rouge < 1 jour.