IA IIA IIIA IVA VA VIA VIIA VIII IB IIB IIIB IVB VB VIB VIIB 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 1
Hiđro
H
1.01
2
Heli
He
4.00
2 3
Liti
Li
6.94
4
Berili
Be
9.01
5
Bo
B
10.81
6
Cacbon
C
12.01
7
Nitơ
N
14.01
8
Oxi
O
16.00
9
Flo
F
19.00
10
Neon
Ne
20.18
3 11
Natri
Na
23.00
12
Magie
Mg
24.31
13
Nhôm
Al
26.98
14
Silic
Si
28.09
15
Photpho
P
30.97
16
Lưu huỳnh
S
32.07
17
Clo
Cl
35.45
18
Argon
Ar
39.95
4 19
Kali
K
39.10
20
Canxi
Ca
40.08
21
Scandi
Sc
44.96
22
Titan
Ti
47.89
23
Vanadi
V
50.94
24
Crom
Cr
52.00
25
Mangan
Mn
54.94
26
Sắt
Fe
55.85
27
Coban
Co
58.93
28
Nikel
Ni
58.69
29
Đồng
Cu
63.55
30
Kẽm
Zn
65.39
31
Gali
Ga
69.72
32
Gecmani
Ge
72.61
33
Asen
As
74.92
34
Selen
Se
78.96
35
Brom
Br
79.90
36
Kripton
Kr
83.80
5 37
Rubidi
Rb
85.48
38
Stronti
Sr
87.62
39
Ytri
Y
88.91
40
Ziriconi
Zr
91.22
41
Niobi
Nb
92.91
42
Molipđen
Mo
95.94
43
Tecnexi
Tc
[99]
44
Ruteni
Ru
101.07
45
Rodi
Rh
102.91
46
Paladi
Pd
106.42
47
Bạc
Ag
107.87
48
Cadimi
Cd
112.41
49
Indi
In
114.82
50
Thiếc
Sn
118.71
51
Antimon
Sb
121.76
52
Telu
Te
127.60
53
Iođ
I
126.90
54
Xenon
Xe
131.29
6 55
Xezi
Cs
132.91
56
Bari
Ba
137.33
57-71
Họ Lantan
*
72
Hafini
Hf
178.49
73
Tantan
Ta
180.95
74
Vonfram
W
183.84
75
Reni
Re
186.21
76
Osmi
Os
190.23
77
Iridi
Ir
192.22
78
Platin
Pt
195.08
79
Vàng
Au
196.97
80
Thủy ngân
Hg
200.59
81
Tali
Tl
204.38
82
Chi
Pb
207.21
83
Bitmut
Bi
208.98
84
Poloni
Po
[210]
85
Atatin
At
[210]
86
Radon
Rn
[222]
7 87
Franxi
Fr
[223]
88
Radi
Ra
[226]
89-103
Họ Actini
**
104
Kusatovi
Rf
[261]
105
Ninsbori
Db
[262]
106

Sg
[263]
107

Bh
[264]
108

Hs
[269]
109

Mt
[268]
110

Ds
[269]
111

Rg
[272]

*
57
Lantan
La
138.91
58
Xeri
Ce
140.12
59
Prazeodim
Pr
140.91
60
Neodim
Nd
144.24
61
Prometi
Pm
[145]
62
Samari
Sm
150.36
63
Europi
Eu
151.97
64
Gadolini
Gd
157.25
65
Tecbi
Tb
158.93
66
Đysprozi
Dy
162.50
67
Holmi
Ho
164.93
68
Eribi
Er
167.26
69
Tuli
Tm
168.93
70
Ytecbi
Yb
173.04
71
Lutexi
Lu
174.97

**
89
Actini
Ac
[227]
90
Thori
Th
232.04
91
Protactini
Pa
231.04
92
Uran
U
238.03
93
Neptuni
Np
[237]
94
Plutoni
Pu
[239]
95
Amerixi
Am
[243]
96
Curi
Cm
[247]
97
Beckeli
Bk
[247]
98
Califoni
Cf
[252]
99
Ensteni
Es
[252]
100
Fecmi
Fm
[257]
101
Mendelevi
Md
[256]
102
Nobeli
No
[259]
103
Lorenxi
Lr
[260]