Ptable.com Periodic Table
PERIODIC TABLE OF ELEMENTS
2
18
Hf
73
Ta
74
W
2
8
18
32
13
2
75
Re
76
Os
2
8
18
32
14
2
2
8
18
32
15
2
77
Ir
Rf
2
8
18
32
32
11
2
105
Db
2
8
18
32
32
12
2
106
Sg
2
8
18
32
32
13
2
107
Bh
108
Hs
2
8
18
32
32
14
2
T
T
T
T
T
2
8
18
32
32
10
2
2
8
18
32
32
15
2
109
Mt
2
8
18
32
17
1
78
Pt
107.87
T
106.42
T
102.91
T
101.07
T
(98)
T
T
2
8
18
32
12
2
Hafnium Tantalum Tungsten Rhenium Osmium Iridium
178.49
180.95
183.84 186.21
190.23 192.22
104
2
8
18
32
18
1
79
Au
Platinum Gold
195.08
196.97
2
8
18
32
32
17
1
110
Ds
2
8
18
32
32
18
1
111
Rg
Cd
2
8
18
18
3
49
In
Cadmium Indium
112.41
114.82
2
8
18
32
18
2
80
Hg
2
8
18
32
18
3
81
Tl
2
8
18
32
32
18
2
112
Cn
2
8
18
32
32
18
3
113
Nh
2
8
18
18
4
Sn
Tin
118.71
2
8
18
32
18
4
82
Pb
2
8
18
32
32
18
4
114
Fl
Sb
G
2
8
18
7
Br
2
8
18
18
6
Te
2
8
18
18
7
53
I
Antimony Tellurium Iodine
121.76
127.60
126.90
2
8
18
32
18
5
83
Bi
G
2
8
18
8
36
Kr
Selenium Bromine Krypton
78.971
79.904 83.798
52
2
8
18
32
18
6
84
Po
2
8
18
32
18
7
85
At
2
8
18
18
8
54
Xe
Xenon
131.29
2
8
18
32
18
8
86
Rn
Bismuth Polonium Astatine Radon
(210)
(222)
208.98 (209)
2
8
18
32
32
18
5
115
Mc
116
Lv
2
8
18
32
32
18
6
117
2
8
18
31
8
2
70
Ts
2
8
18
32
32
18
7
118
2
8
18
32
8
2
71
2
8
18
32
32
18
8
Og
Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
(267)
(268)
(269)
(270)
(277)
(278)
(281)
(282)
(285)
(286)
(289)
(290)
(293)
(294)
(294)
T
For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.
2
8
18
18
9
2
57
2
8
18
19
9
2
58
2
8
18
21
8
2
59
2
8
18
22
8
2
60
61
2
8
18
23
8
2
2
8
18
24
8
2
62
2
8
18
25
8
2
63
2
8
18
25
9
2
64
2
8
18
27
8
2
65
2
8
18
28
8
2
66
2
8
18
29
8
2
67
2
8
18
30
8
2
68
69
2
8
18
32
9
2
2
8
18
32
18
10
2
90
2
8
18
32
20
9
2
91
2
8
18
32
21
9
2
92
93
2
8
18
32
22
9
2
94
2
8
18
32
24
8
2
95
2
8
18
32
25
8
2
96
2
8
18
32
25
9
2
97
2
8
18
32
27
8
2
98
2
8
18
32
28
8
2
99
2
8
18
32
29
8
2
2
8
18
32
30
8
2
100
101
2
8
18
32
31
8
2
173.05
102
2
8
18
32
32
8
2
174.97
L
168.93
L
167.26
L
164.93
L
162.50
L
158.93
L
157.25
L
151.96
L
150.36
L
(145)
L
144.24
L
L
140.91
103
2
8
18
32
32
8
3
(259)
(266)
A
(258)
A
(257)
Design Copyright ? 2017 Michael Dayah (michael@). For a fully interactive version with orbitals, isotopes, compounds, and free printouts, visit
A
(252)
A
(251)
A
(247)
A
(247)
A
(243)
A
(244)
A
(237)
A
238.03
A
231.04
A
232.04
A
(227)
A
Th
Pa
U
Np
Pu
Am Cm Bk
Cf
Es
Fm Md No
Lr
7 Ac
Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium
A
Ptable
.com
140.12
L
L
89
2
8
18
32
18
9
2
L
Ce
Pr
Nd Pm Sm Eu
Gd Tb
Dy
Ho Er
Tm Yb
Lu
6 La
Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium
138.91
K
L
M
N
O
P
Q
G
N
N
Ar
Chlorine Argon
35.45
39.948
35
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
G
M
2
8
18
18
5
51
Se
2
8
8
18
N
As
N
Cl
2
8
18
6
34
2
8
7
17
N
2
8
18
5
33
Germanium Arsenic
72.630 74.922
50
N
S
Phosphorus Sulfur
30.974
32.06
N
M
Ge
Mercury Thallium Lead
200.59 204.38 207.2
T
89¨C103
95.95
T
57¨C71
2
8
18
32
11
2
T
72
92.906
T
2
8
18
32
10
2
T
T
91.224
2
8
18
18
2
48
Gallium
69.723
N
N
M
G
N
2
8
18
18
1
47
Ga
2
8
6
16
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
G
2
8
18
18
46
Zn
Zinc
65.38
Ne
N
2
8
18
16
1
45
Copper
63.546
2
8
5
15
M
T
2
8
18
15
1
44
Cu
2
8
18
4
32
F
2
8
10
M
43
55.845
Nickel
58.693
2
8
18
3
31
2
7
9
M
2
8
18
13
2
Ni
2
8
18
2
30
Helium
4.0026
Halogens
P
42
54.938
T
T
2
8
18
13
1
Cobalt
58.933
2
8
18
1
29
O
M
41
51.996
Co
2
8
16
2
28
2
6
8
P
2
8
18
12
1
T
(226)
2
Nitrogen Oxygen Fluorine Neon
14.007
15.999 18.998
20.180
P
P
40
50.942
2
8
15
2
27
P
2
8
14
2
26
T
2
8
13
2
25
T
2
8
18
32
18
8
2
E
K
88.906
137.33
88
Si
P
2
8
18
10
2
T
47.867
T
56
2
8
18
18
8
2
Ra
7 Fr
Francium Radium
(223)
17
P
39
E
K
87
2
8
18
32
18
8
1
Al
2
8
4
14
2
5
7
N
Carbon
12.011
P
2
8
18
9
2
T
44.956
T
87.62
2
8
3
P
38
C
Boron
10.81
13
2
4
6
P
2
8
18
8
2
Ba
6 Cs
Caesium Barium
132.91
B
T
2
8
13
1
24
T
2
8
11
2
23
T
2
8
10
2
22
T
2
8
9
2
21
T
E
40.078
2
3
5
E
2
8
8
2
20
T
55
16
Pnictogens Chalcogens
24.305
E
K
2
8
18
18
8
1
15
Aluminium Silicon
26.982 28.085
Sr
Y
Zr
Nb Mo Tc
Ru
Rh Pd
Ag
5 Rb
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver
85.468
14
He
T
37
13
Nonmetals
M
Rf Unknown
Actinoids
(Actinides)
P
12
T
E
2
8
2
A
H Gas
9.0122
L
Lanthanoids
(Lanthanides)
E
N
K
K
K
2
8
18
8
1
12
Noble gases
Hg Liquid
2
2
4
Ca
Sc
Ti
V
Cr
Mn Fe
4 K
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron
39.098
11
Other
nonmetals
19
C Solid
Post-transition
metals
2
8
8
1
10
Metalloids
Weight
Mg
3 Na
Sodium Magnesium
22.990
9
Transition
metals
11
8
Metals
Alkaline earth
metals
2
8
1
7
2
Be
2 Li
Lithium Beryllium
6.94
6
Alkali metals
2
1
3
5
Atomic #
Symbol
1 H
Hydrogen Name
1.008
4
K
1
1
3
K
L
M
N
O
P
Q
G
1
K
L
M
N
O
P
Q
................
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