1
H
Hydrogène
1s1
1,008
3
Lithium
1s2 2s1
6,94
+1
4
Béryllium
1s2 2s2
9,012
+2
–1 +1
9,322
5,391
13,59
Li Be
11
Sodium
[Ne] 3s1
22,99
+1
12
Magnésium
[Ne] 3s2
24,31
+2
7,646
5,139
Na Mg
19
K
Potassium
[Ar] 4s1
39,10
37
Rubidium
[Kr] 5s1
85,47
+1
20
Ca...
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1
H
Hydrogène
1s1
1,008
3
Lithium
1s2 2s1
6,94
+1
4
Béryllium
1s2 2s2
9,012
+2
–1 +1
9,322
5,391
13,59
Li Be
11
Sodium
[Ne] 3s1
22,99
+1
12
Magnésium
[Ne] 3s2
24,31
+2
7,646
5,139
Na Mg
19
K
Potassium
[Ar] 4s1
39,10
37
Rubidium
[Kr] 5s1
85,47
+1
20
Ca
Calcium
[Ar] 4s2
40,08
38
Strontium
[Kr] 5s2
87,62
+2
21
Scandium
[Ar] 4s2 3d1
44,96
39
Yttrium
[Kr] 5s2 4d1
88,91
+2 +3
+1 +2 +3
6,217
5,694
4,177
6,561
6,113
4,340
Sc
Rb Sr Y
55
Césium
[Xe] 6s1
132,91
+1
56
Baryum
[Xe] 6s2
137,33
+2
57
Lanthane
[Xe] 6s2 5d1
138,91
+3
5,577
5,211
3,893
Cs Ba
La
22
Ti
Titane
[Ar] 4s2 3d2
47,87
40
Zirconium
[Kr] 5s2 4d2
91,22
+4
23
V
Vanadium
[Ar] 4s2 3d3
50,94
41
Niobium
[Kr] 5s1 4d4
92,91
+3 +5
24
Chrome
[Ar] 4s1 3d5
52,00
42
Molybdène
[Kr] 5s1 4d5
95,96
+2 +3 +4 +5 +6
+2 +3 +4 +2 +3 +4 +5 +2 +3 +6
7,092
6,758
6,633
6,766
6,746
6,828
Cr
Zr Nb Mo
72
Hafnium
[Xe] 6s2 4f14 5d2
178,49
+4
73
Tantale
[Xe] 6s2 4f14 5d3
180,95
+5
74
Tungstène
[Xe] 6s2 4f14 5d4
183,84
+2 +3 +4 +5 +6
7,864
7,549
6,825
Hf Ta W
25
M
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