Periodic Table Elements and Symbol




Atomic No
Chemical Element Name
Symbol
Discovery (Year)
Group
Atomic Mass
1
H
1776
1
1.0079
2
He
1895
18
4.0026
3
Li
1817
1
6.941
4
Be
1797
2
9.0122
5
B
1808
13
10.811
6
C
Ancient
14
12.0107
7
N
1772
15
14.0067
8
O
1774
16
15.9994
9
F
1886
17
18.9984
10
Ne
1898
18
20.1797
11
Na
1807
1
22.9897
12
Mg
1755
2
24.305
13
Al
1825
13
26.9815
14
Si
1824
14
28.0855
15
P
1669
15
30.9738
16
S
Ancient
16
32.065
17
Cl
1774
17
35.453
18
Ar
1894
18
39.948
19
K
1807
1
39.0983
20
Ca
1808
2
40.078
21
Sc
1879
3
44.9559
22
Ti
1791
4
47.867
23
V
1830
5
50.9415
24
Cr
1797
6
51.9961
25
Mn
1774
7
54.938
26
Fe
Ancient
8
55.845
27
Co
1735
9
58.9332
28
Ni
1751
10
58.6934
29
Cu
Ancient
11
63.546
30
Zn
Ancient
12
65.39
31
Ga
1875
13
69.723
32
Ge
1886
14
72.64
33
As
Ancient
15
74.9216
34
Se
1817
16
78.96
35
Br
1826
17
79.904
36
Kr
1898
18
83.8
37
Rb
1861
1
85.4678
38
Sr
1790
2
87.62
39
Y
1794
3
88.9059
40
Zr
1789
4
91.224
41
Nb
1801
5
92.9064
42
Mo
1781
6
95.94
43
Tc
1937
7
98
44
Ru
1844
8
101.07
45
Rh
1803
9
102.9055
46
Pd
1803
10
106.42
47
Ag
Ancient
11
107.8682
48
Cd
1817
12
112.411
49
In
1863
13
114.818
50
Sn
Ancient
14
118.71
51
Sb
Ancient
15
121.76
52
Te
1783
16
127.6
53
In
1811
17
126.9045
54
Xe
1898
18
131.293
55
Cs
1860
1
132.9055
56
Ba
1808
2
137.327
57
La
1839
3
138.9055
58
Ce
1803
101
140.116
59
Pr
1885
101
140.9077
60
Nd
1885
101
144.24
61
Pm
1945
101
145
62
Sm
1879
101
150.36
63
Eu
1901
101
151.964
64
Gd
1880
101
157.25
65
Tb
1843
101
158.9253
66
Dy
1886
101
162.5
67
Ho
1867
101
164.9303
68
Er
1842
101
167.259
69
Tm
1879
101
168.9342
70
Yb
1878
101
173.04
71
Lu
1907
101
174.967
72
Hf
1923
4
178.49
73
Ta
1802
5
180.9479
74
W
1783
6
183.84
75
Re
1925
7
186.207
76
Os
1803
8
190.23
78
Pt
1803
9
192.217
79
Au
1735
10
195.078
77
Ir
Ancient
11
196.9665
80
Hg
Ancient
12
200.59
81
Tl
1861
13
204.3833
82
Pb
Ancient
14
207.2
83
Bi
Ancient
15
208.9804
84
Po
1898
16
209
85
At
1940
17
210
86
Rn
1900
18
222
87
Fr
1939
1
223
88
Ra
1898
2
226
89
Ac
1899
3
227
90
Th
1829
102
232.0381
91
Pa
1913
102
231.0359
92
U
1789
102
238.0289
93
Np
1940
102
237
94
Pu
1940
102
244
95
Am
1944
102
243
96
Cm
1944
102
247
97
Bk
1949
102
247
98
Cf
1950
102
251
99
Es
1952
102
252
100
Fm
1952
102
257
101
Md
1955
102
258
102
No
1958
102
259
103
Lr
1961
102
262
104
Rf
1964
4
261
105
Db
1967
5
262
106
Sg
1974
6
266
107
Bh
1981
7
264
108
Hs
1984
8
277
109
Mt
1982
9
268
110
Ds
1994
10
261.9
111
Rg
1994
11
271.8
112
Cn
1996
12
285
113
Uut
2003
13
286
114
Fl
1998
14
289
115
Uup
2010
15
288
116
Lv
2000
16
293
117
Uus
2010
17
260.9
118
Uuo
2006
18
294

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