Periodesystemet for Grunnstoffer

Includes interactive visualizations, properties, orbitals, isotopes, and compound mixing.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pnictogens 16 Chalcogens 17 Halogener 18
1 1 H Hydrogen 1,0081 Atomic # Symbol Navn Atomvekt


C Fast stoff
Hg Væske
H Gass
Rf Ukjent
Metaller Halvmetaller Ikke-metaller
Alkalimetaller Jordalkalimetaller Lantanoider Overgangsmetaller Øvrige metaller Ikke-metaller Edelgasser
Aktinoider
Kelvin
°Celsius
°Fahrenheit
7s
6s
5s
4s
3s
2s
1s
7p
6p
5p
4p
3p
2p
6d
5d
4d
3d
=
m=
n=
5f
4f
s
p
d
f
α Alfastråling β− Betastråling
p Protonutsendelse β+ Positron emission
n Nøytronutsendelse K+ Elektroninnfangning
SF Spontan fisjon   Stabil
2 He Helium 4,00262 K
2 3 Li Litium 6,942
1
4 Be Beryllium 9,01222
2
5 B Bor 10,812
3
6 C Karbon 12,0112
4
7 N Nitrogen 14,0072
5
8 O Oksygen 15,9992
6
9 F Fluor 18,9982
7
10 Ne Neon 20,1802
8
K
L
3 11 Na Natrium 22,9902
8
1
12 Mg Magnesium 24,3052
8
2
13 Al Aluminium 26,9822
8
3
14 Si Silisium 28,0852
8
4
15 P Fosfor 30,9742
8
5
16 S Svovel 32,062
8
6
17 Cl Klor 35,452
8
7
18 Ar Argon 39,9482
8
8
K
L
M
4 19 K Kalium 39,0982
8
8
1
20 Ca Kalsium 40,0782
8
8
2
21 Sc Scandium 44,9562
8
9
2
22 Ti Titan 47,8672
8
10
2
23 V Vanadium 50,9422
8
11
2
24 Cr Krom 51,9962
8
13
1
25 Mn Mangan 54,9382
8
13
2
26 Fe Jern 55,8452
8
14
2
27 Co Kobolt 58,9332
8
15
2
28 Ni Nikkel 58,6932
8
16
2
29 Cu Kobber 63,5462
8
18
1
30 Zn Sink 65,382
8
18
2
31 Ga Gallium 69,7232
8
18
3
32 Ge Germanium 72,6302
8
18
4
33 As Arsen 74,9222
8
18
5
34 Se Selen 78,9712
8
18
6
35 Br Brom 79,9042
8
18
7
36 Kr Krypton 83,7982
8
18
8
K
L
M
N
5 37 Rb Rubidium 85,4682
8
18
8
1
38 Sr Strontium 87,622
8
18
8
2
39 Y Yttrium 88,9062
8
18
9
2
40 Zr Zirkonium 91,2242
8
18
10
2
41 Nb Niob 92,9062
8
18
12
1
42 Mo Molybden 95,952
8
18
13
1
43 Tc Technetium (98)2
8
18
13
2
44 Ru Ruthenium 101,072
8
18
15
1
45 Rh Rhodium 102,912
8
18
16
1
46 Pd Palladium 106,422
8
18
18
47 Ag Sølv 107,872
8
18
18
1
48 Cd Kadmium 112,412
8
18
18
2
49 In Indium 114,822
8
18
18
3
50 Sn Tinn 118,712
8
18
18
4
51 Sb Antimon 121,762
8
18
18
5
52 Te Tellur 127,602
8
18
18
6
53 I Jod 126,902
8
18
18
7
54 Xe Xenon 131,292
8
18
18
8
K
L
M
N
O
6 55 Cs Cesium 132,912
8
18
18
8
1
56 Ba Barium 137,332
8
18
18
8
2
57–71 72 Hf Hafnium 178,492
8
18
32
10
2
73 Ta Tantal 180,952
8
18
32
11
2
74 W Wolfram 183,842
8
18
32
12
2
75 Re Rhenium 186,212
8
18
32
13
2
76 Os Osmium 190,232
8
18
32
14
2
77 Ir Iridium 192,222
8
18
32
15
2
78 Pt Platina 195,082
8
18
32
17
1
79 Au Gull 196,972
8
18
32
18
1
80 Hg Kvikksølv 200,592
8
18
32
18
2
81 Tl Thallium 204,382
8
18
32
18
3
82 Pb Bly 207,22
8
18
32
18
4
83 Bi Vismut 208,982
8
18
32
18
5
84 Po Polonium (209)2
8
18
32
18
6
85 At Astat (210)2
8
18
32
18
7
86 Rn Radon (222)2
8
18
32
18
8
K
L
M
N
O
P
7 87 Fr Francium (223)2
8
18
32
18
8
1
88 Ra Radium (226)2
8
18
32
18
8
2
89–103 104 Rf Rutherfordium (267)2
8
18
32
32
10
2
105 Db Dubnium (268)2
8
18
32
32
11
2
106 Sg Seaborgium (269)2
8
18
32
32
12
2
107 Bh Bohrium (270)2
8
18
32
32
13
2
108 Hs Hassium (277)2
8
18
32
32
14
2
109 Mt Meitnerium (278)2
8
18
32
32
15
2
110 Ds Darmstadtium (281)2
8
18
32
32
17
1
111 Rg Røntgenium (282)2
8
18
32
32
17
2
112 Cn Copernicium (285)2
8
18
32
32
18
2
113 Nh Nihonium (286)2
8
18
32
32
18
3
114 Fl Flerovium (289)2
8
18
32
32
18
4
115 Mc Moscovium (290)2
8
18
32
32
18
5
116 Lv Livermorium (293)2
8
18
32
32
18
6
117 Ts Tennessine (294)2
8
18
32
32
18
7
118 Og Oganesson (294)2
8
18
32
32
18
8
K
L
M
N
O
P
Q
For grunnstoffer uten stabile isotoper er massetallet for isotopen med lengst halveringstid oppgitt i parentes.
57 La Lantan 138,912
8
18
18
9
2
58 Ce Cerium 140,122
8
18
19
9
2
59 Pr Praseodym 140,912
8
18
21
8
2
60 Nd Neodym 144,242
8
18
22
8
2
61 Pm Promethium (145)2
8
18
23
8
2
62 Sm Samarium 150,362
8
18
24
8
2
63 Eu Europium 151,962
8
18
25
8
2
64 Gd Gadolinium 157,252
8
18
25
9
2
65 Tb Terbium 158,932
8
18
27
8
2
66 Dy Dysprosium 162,502
8
18
28
8
2
67 Ho Holmium 164,932
8
18
29
8
2
68 Er Erbium 167,262
8
18
30
8
2
69 Tm Thulium 168,932
8
18
31
8
2
70 Yb Ytterbium 173,052
8
18
32
8
2
71 Lu Lutetium 174,972
8
18
32
9
2
89 Ac Actinium (227)2
8
18
32
18
9
2
90 Th Thorium 232,042
8
18
32
18
10
2
91 Pa Protactinium 231,042
8
18
32
20
9
2
92 U Uran 238,032
8
18
32
21
9
2
93 Np Neptunium (237)2
8
18
32
22
9
2
94 Pu Plutonium (244)2
8
18
32
24
8
2
95 Am Americium (243)2
8
18
32
25
8
2
96 Cm Curium (247)2
8
18
32
25
9
2
97 Bk Berkelium (247)2
8
18
32
27
8
2
98 Cf Californium (251)2
8
18
32
28
8
2
99 Es Einsteinium (252)2
8
18
32
29
8
2
100 Fm Fermium (257)2
8
18
32
30
8
2
101 Md Mendelevium (258)2
8
18
32
31
8
2
102 No Nobelium (259)2
8
18
32
32
8
2
103 Lr Lawrencium (266)2
8
18
32
32
8
3

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