| Group | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| I | II | | III | IV | V | VI | VII | VIII |
| Period | |
| 1 | hydrogen
1
H
1.00794(7) | | helium
2
He
4.002602(2) |
| 2 | lithium
3
Li
6.941(2) | beryllium
4
Be
9.012182(3) | | boron
5
B
10.811(7) | carbon
6
C
12.0107(8) | nitrogen
7
N
14.00674(7) | oxygen
8
O
15.9994(3) | fluorine
9
F
18.9984032(5) | neon
10
Ne
20.1797(6) |
| 3 | sodium
11
Na
22.98976928(2) | magnesium
12
Mg
24.3050(6) | | aluminium
13
Al
26.9815386(8) | silicon
14
Si
28.0855(3) | phosphorus
15
P
30.973762(2) | sulfur
16
S
32.065(5) | chlorine
17
Cl
35.453(2) | argon
18
Ar
39.948(1) |
| 4 | potassium
19
K
39.0983(1) | calcium
20
Ca
40.078(4) | scandium
21
Sc
44.955912(6) | titanium
22
Ti
47.867(1) | vanadium
23
V
50.9415(1) | chromium
24
Cr
51.9961(6) | manganese
25
Mn
54.938045(5) | iron
26
Fe
55.845(2) | cobalt
27
Co
58.933195(5) | nickel
28
Ni
58.6934(4) | copper
29
Cu
63.546(3) | zinc
30
Zn
65.38(2) | gallium
31
Ga
69.723(1) | germanium
32
Ge
72.61(2) | arsenic
33
As
74.92160(2) | selenium
34
Se
78.96(3) | bromine
35
Br
79.904(1) | krypton
36
Kr
83.798(2) |
| 5 | rubidium
37
Rb
85.4678(3) | strontium
38
Sr
87.62(1) | yttrium
39
Y
88.90585(2) | zirconium
40
Zr
91.224(2) | niobium
41
Nb
92.90638(2) | molybdenum
42
Mo
95.96(2) | technetium
43
Tc
[97.9072] | ruthenium
44
Ru
101.07(2) | rhodium
45
Rh
102.90550(2) | palladium
46
Pd
106.42(1) | silver
47
Ag
107.8682(2) | cadmium
48
Cd
112.411(8) | indium
49
In
114.818(3) | tin
50
Sn
118.710(7) | antimony
51
Sb
121.760(1) | tellurium
52
Te
127.60(3) | iodine
53
I
126.90447(3) | xenon
54
Xe
131.293(6) |
| 6 | caesium
55
Cs
132.9054519(2) | barium
56
Ba
137.327(7) | Lanthanoids
57-71
*
| hafnium
72
Hf
178.49(2) | tantalum
73
Ta
180.94788(2) | tungsten
74
W
183.84(1) | rhenium
75
Re
186.207(1) | osmium
76
Os
190.23(3) | iridium
77
Ir
192.217(3) | platinum
78
Pt
195.084(9) | gold
79
Au
196.966569(4) | mercury
80
Hg
200.59(2) | thallium
81
Tl
204.3833(2) | lead
82
Pb
207.2(1) | bismuth
83
Bi
208.98040(1) | polonium
84
Po
[208.9824] | astatine
85
At
[209.9871] | radon
86
Rn
[222.0176] |
| 7 | francium
87
Fr
[223.0197] | radium
88
Ra
[226.0254] | Actinoids
89-103
**
| rutherfordium
104
Rf
[263.1125] | dubnium
105
Db
[262.1144] | seaborgium
106
Sg
[266.1219] | bohrium
107
Bh
[264.1247] | hassium
108
Hs
[269.1341] | meitnerium
109
Mt
[268.1388] | darmstadtium
110
Ds
[272.1463] | roentgenium
111
Rg
[272.1535] | ununbium
112
Uub
[277] | ununtrium
113
Uut
[284] | ununquadium
114
Uuq
[289] | ununpentium
115
Uup
[288] | ununhexium
116
Uuh
[292] | ununseptium
117
Uus
[292]*** | ununoctium
118
Uuo
[294] |
| * Lanthanoids | lanthanum
57
La
138.90547(7) | cerium
58
Ce
140.116(1) | praseodymium
59
Pr
140.90765(2) | neodymium
60
Nd
144.242(3) | promethium
61
Pm
[144.9127] | samarium
62
Sm
150.36(2) | europium
63
Eu
151.964(1) | gadolinium
64
Gd
157.25(3) | terbium
65
Tb
158.92535(2) | dysprosium
66
Dy
162.500(1) | holmium
67
Ho
164.93032(2) | erbium
68
Er
167.259(3) | thulium
69
Tm
168.93421(2) | ytterbium
70
Yb
173.054(5) | lutetium
71
Lu
174.9668(1) |
| ** Actinoids | actinium
89
Ac
[227.0277] | thorium
90
Th
232.03806(2) | protactinium
91
Pa
231.03588(2) | uranium
92
U
238.02891(3) | neptunium
93
Np
[237.0482] | plutonium
94
Pu
[244.0642] | americium
95
Am
[243.0614] | curium
96
Cm
[247.0703] | berkelium
97
Bk
[247.0703] | californium
98
Cf
[251.0796] | einsteinium
99
Es
[252.0830] | fermium
100
Fm
[257.0951] | mendelevium
101
Md
[258.0984] | nobelium
102
No
[259.1011] | lawrencium
103
Lr
[262.110] |
