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Radioactive
99
Es
[252] 
Rutherfordium
2
8
18
32
29
8
2
Atomnummer
Symbol
Navn
Vægt i units
[gennemsnit ved ustabile grundstoffer]
Elektronfordeling i skaller







57-71
89-103
1
H
1,008 
Hydrogen
1
2
He
4,003 
Helium
2
3
Li
6,941 
Lithium
2
1
4
Be
9,012 
Beryllium
2
2
5
B
10,811 
Boron
2
3
6
C
12,011 
Carbon
2
4
7
N
14,007 
Nitrogen
2
5
8
O
15,999 
Oxygen
2
6
9
F
18,998 
Fluorine
2
7
10
Ne
20,18 
Neon
2
8
11
Na
22,99 
Sodium
2
8
1
12
Mg
24,305 
Magnesium
2
8
2
13
Al
26,982 
Aluminium
2
8
3
14
Si
28,086 
Silicon
2
8
4
15
P
30,974 
Phosphorus
2
8
5
16
S
32,066 
Sulfur
2
8
6
17
Cl
35,453 
Chlorine
2
8
7
18
Ar
39,948 
Argon
2
8
8
19
K
39,098 
Potassium
2
8
8
1
20
Ca
40,078 
Calcium
2
8
8
2
21
Sc
44,954 
Scandium
2
8
9
2
22
Ti
47,867 
Titanium
2
8
10
2
23
V
50,941 
Vanadium
2
8
11
2
24
Cr
51,996 
Chromium
2
8
13
1
25
Mn
54,938 
Manganese
2
8
13
2
26
Fe
55,745 
Iron
2
8
14
2
27
Co
58,933 
Cobalt
2
8
15
2
28
Ni
58,693 
Nickel
2
8
16
2
29
Cu
63,546 
Copper
2
8
18
1
30
Zn
65,39 
Zinc
2
8
18
2
31
Ga
69,723 
Gallium
2
8
18
3
32
Ge
72,61 
Germanium
2
8
18
4
33
As
74,922 
Arsenic
2
8
18
5
34
Se
78,96 
Selenium
2
8
18
6
35
Br
79,904 
Bromine
2
8
18
7
36
Kr
83,8 
Krypton
2
8
18
8
37
Rb
85,468 
Rubidium
2
8
18
8
1
38
Sr
87,62 
Strontium
2
8
18
8
2
39
Y
88,906 
Yttrium
2
8
18
9
2
40
Zr
91,224 
Zirconium
2
8
18
10
2
41
Nb
92,906 
Niobium
2
8
18
12
1
42
Mo
95,94 
Molybdenum
2
8
18
13
1
Radioactive
43
Tc
[98] 
Technetium
2
8
18
14
1
44
Ru
101,07 
Ruthenium
2
8
18
15
1
45
Rh
102,906 
Rhodium
2
8
18
16
1
46
Pd
106,42 
Palladium
2
8
18
18
47
Ag
107,868 
Silver
2
8
18
18
1
48
Cd
112,411 
Cadmium
2
8
18
18
2
49
In
114,818 
Indium
2
8
18
18
3
50
Sn
118,71 
Tin
2
8
18
18
4
51
Sb
121,76 
Antimony
2
8
18
18
5
52
Te
127,6 
Tellurium
2
8
18
18
6
53
I
126,904 
Iodine
2
8
18
18
7
54
Xe
131,29 
Xenon
2
8
18
18
8
55
Cs
132,905 
Caesium
2
8
18
18
8
1
56
Ba
137,327 
Barium
2
8
18
18
8
2
57
La
138,906 
Lanthanum
2
8
18
18
9
2
58
Ce
140,116 
Cerium
2
8
18
20
8
2
59
Pr
140,908 
Praseodymium
2
8
18
21
8
2
60
Nd
144,24 
Neodymium
2
8
18
22
8
2
Radioactive
61
Pm
[145] 
Promethium
2
8
18
23
8
2
62
Sm
150,36 
Samarium
2
8
18
24
8
2
63
Eu
151,964 
Europium
2
8
18
25
8
2
64
Gd
157,25 
Gadolinium
2
8
18
25
9
2
65
Tb
158,925 
Terbium
2
8
18
27
8
2
66
Dy
162,5 
Dysprosium
2
8
18
28
8
2
67
Ho
164,93 
Holmium
2
8
18
29
8
2
68
Er
167,26 
Erbium
2
8
18
30
8
2
69
Tm
168,934 
Thulium
2
8
18
31
8
2
70
Yb
173,04 
Ytterbium
2
8
18
32
8
2
71
Lu
174,967 
Lutetium
2
8
18
32
9
2
72
Hf
178,49 
Hafnium
2
8
18
32
10
2
73
Ta
180,948 
Tantalum
2
8
18
32
11
2
74
W
183,84 
Tungsten
2
8
18
32
12
2
75
Re
186,207 
Rhenium
2
8
18
32
13
2
76
Os
190,23 
Osmium
2
8
18
32
14
2
77
Ir
192,217 
Iridium
2
8
18
32
15
2
78
Pt
195,078 
Platinum
2
8
18
32
17
2
79
Au
196,967 
Gold
2
8
18
32
18
1
80
Hg
200,59 
Mercury
2
8
18
32
18
2
81
Tl
204,38 
Thallium
2
8
18
32
18
3
82
Pb
207,2 
Lead
2
8
18
32
18
4
83
Bi
208,98 
Bismuth
2
8
18
32
18
5
Radioactive
84
Po
[209] 
Polonium
2
8
18
32
18
6
Radioactive
85
At
[210] 
Astatine
2
8
18
32
18
7
Radioactive
86
Rn
[222] 
Radon
2
8
18
32
18
8
Radioactive
87
Fr
[223] 
Francium
2
8
18
32
18
8
1
Radioactive
88
Ra
[226] 
Radium
2
8
18
32
18
8
2
Radioactive
89
Ac
[227] 
Actinium
2
8
18
32
18
9
2
Radioactive
90
Th
[232] 
Thorium
2
8
18
32
18
10
2
Radioactive
91
Pa
[231] 
Protactinium
2
8
18
32
20
9
2
Radioactive
92
U
[238] 
Uranium
2
8
18
32
21
9
2
Radioactive
93
Np
[237] 
Neptunium
2
8
18
32
22
9
2
Radioactive
94
Pu
[244] 
Plutonium
2
8
18
32
24
8
2
Radioactive
95
Am
[243] 
Americium
2
8
18
32
25
8
2
Radioactive
96
Cm
[247] 
Curium
2
8
18
32
25
9
2
Radioactive
97
Bk
[247] 
Berkelium
2
8
18
32
27
8
2
Radioactive
98
Cf
[251] 
Californium
2
8
18
32
28
8
2
Radioactive
99
Es
[252] 
Einsteinium
2
8
18
32
29
8
2
Radioactive
100
Fm
[257] 
Fermium
2
8
18
32
30
8
2
Radioactive
101
Md
[258] 
Mendelevium
2
8
18
32
31
8
2
Radioactive
102
No
[259] 
Nobelium
2
8
18
32
32
8
2
Radioactive
103
Lr
[262] 
Lawrencium
2
8
18
32
32
9
2
Radioactive
104
Rf
[261] 
Rutherfordium
2
8
18
32
32
10
2
Radioactive
105
Db
[262] 
Dubnium
2
8
18
32
32
11
2
Radioactive
106
Sg
[266] 
Seaborgium
2
8
18
32
32
12
2
Radioactive
107
Bh
[264] 
Bohrium
2
8
18
32
32
13
2
Radioactive
108
Hs
[269] 
Hassium
2
8
18
32
32
14
2
Radioactive
109
Mt
[268] 
Meitnerium
2
8
18
32
32
15
2
Radioactive
110
Ds
[281] 
Darmstadtium
2
8
18
32
32
16
2
Radioactive
111
Rg
[284] 
Roentgenium
2
8
18
32
32
17
2
Radioactive
112
Cn
[285] 
Copernicium
2
8
18
32
32
18
2
Radioactive
113
Nh
[284] 
Nihonium
2
8
18
32
32
18
3
Radioactive
114
Fl
[289] 
Flerovium
2
8
18
32
32
18
4
Radioactive
115
Mc
[288] 
Moscovium
2
8
18
32
32
18
5
Radioactive
116
Lv
[289] 
Livermorium
2
8
18
32
32
18
6
Radioactive
117
Ts
[292] 
Tennessine
2
8
18
32
32
18
7
Radioactive
118
Og
[293] 
Oganesson
2
8
18
32
32
18
8
K
K
L
K
L
M
K
L
M
N
K
L
M
N
O
K
L
M
N
O
P
K
L
M
N
O
P
Q
K
L
M
N
O
P
K
L
M
N
O
P
Q
Metal
Halvmetal
Ikke metal
Fe
Fast
Hg
Flydende
Cl
Gas
Bh
Ukendt
Radioactive
Ingen stabile isotoper
Alkalimetaller
Jordalkalimetaller
Overgangsmetaller
Andre metaller
Lanthanider
Actinider
Halvmetal
Andre ikkemetaller
Halogener
Ædelgasser
Fe
Fast
Hg
Flydende
Cl
Gas
Bh
Ukendt
Radioactive
Ingen stabile isotoper
Fast
Flydende
Gas
Ukendt
Radioactive
Ingen stabile isotoper
Massefylde over
Massefylde under
Ukendt
Radioactive
Ingen stabile isotoper