1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
1
Hydrogen
1.008
 
         
2
Helium
4.003
2
3
Lithium
6.938
4
Beryllium
9.012
5
Boron
10.806
6
Carbon
12.0096
7
Nitrogen
14.006
8
Oxygen
15.999
9
Fluorine
18.998
10
Neon
20.1797
3
11
Sodium
22.9898
12
Magnesium
24.304
13
Aluminium
26.982
14
Silicon
28.084
15
Phosphorus
30.974
16
Sulfur
32.059
17
Chlorine
35.446
18
Argon
39.948
4
19
Potassium
39.098
20
Calcium
40.078
21
Scandium
44.956
22
Titanium
47.867
23
Vanadium
50.942
24
Chromium
51.996
25
Manganese
54.938
26
Iron
55.845
27
Cobalt
58.933
28
Nickel
58.693
29
Copper
63.546
30
Zinc
65.38
31
Gallium
69.723
32
Germanium
72.630
33
Arsenic
74.922
34
Selenium
78.971
35
Bromine
79.901
36
Krypton
83.798
5
37
Rubidium
85.468
38
Strontium
87.62
39
Yttrium
88.906
40
Zirconium
91.224
41
Niobium
92.906
42
Molybdenur
95.95
43
Technetium
(98)
44
Ruthenium
101.07
45
Rhodium
102.906
46
Palladium
106.42
47
Silver
107.868
48
Cadmium
112.414
49
Indium
114.818
50
Tin
118.710
51
Antimony
121.760
52
Tellurium
127.60
53
Iodine
126.904
54
Xenon
131.293
6
55
Caesium
132.905
56
Barium
137.327
57-71
#Lanthanides
72
Hafnium
178.49
73
Tantalum
180.948
74
Tungsten
183.84
75
Rhenium
186.207
76
Osmium
190.23
77
Iridium
192.217
78
Platinum
195.084
79
Gold
196.967
80
Mecury
200.592
81
Thallium
204.382
82
Lead
207.2
83
Bismuth
208.980
84
Polonium
(209)
85
Astatine
(210)
86
Radon
(222)
7
87
Francium
(223)
88
Radium
(226)
89-103
##Actinides
104
Rutherfordium
(267)
105
Dubnium
(268)
106
Seaborgium
(271)
107
Bohrium
(270)
108
Hassium
(269)
109
Meitnerium
(278)
110
Darmstadtium
(281)
111
Roentgenium
(282)
112
Copernicium
(285)
113
Nihonium
(286)
114
Flerovium
(289)
115
Moscovium
(289)
116
Livermorium
(293)
117
Tennessine
(294)
118
Oganesson
(294)
#Lanthanides
57
Lanthanum
138.905
58
Cerium
140.116
59
Praseodymium
140.908
60
Neodymium
144.242
61
Promethium
(145)
62
Samarium
150.36
63
Europium
151.964
64
Gadolinium
157.25
65
Terbium
158.925
66
Dysprosium
162.500
67
Holmium
164.93033
68
Erbium
167.259
69
Thulium
168.934
70
Ytterbium
173.045
71
Lutetium
174.967
##Actinides
89
Actinium
(227)
90
Thorium
232.038
91
Protactinium
231.036
92
Uranium
238.029
93
Neptunium
(237)
94
Plutonium
(244)
95
Americium
(243)
96
Curium
(247)
97
Berkelium
(247)
98
Californium
(251)
99
Einsteinium
(252)
100
Fermium
(257)
101
Mendelevium
(258)
102
Nobelium
(259)
103
Lawrencium
(266)
atomic number
symbol
name
atomic mass