Ptable
.com
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K
N
E
L
T
P
G
K
K
K
K
K
E
E
E
E
E
L
L
L
L
L
L
L
L
L
L
L
L
L
L
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
TT
T
T
T
T
T
T
T
T
T
P
P
P
P
P
P
P
P
M
M
M
M
M
M
M
N
N
N
N
N
G
G
G
G
G
N
N
N
N
N
E
K
L
A
T
P
M
N
G
89–103
57–71
2
8
18
32
18
3
2
8
18
32
32
18
3
2
8
18
3
2
8
18
4
2
8
18
18
3
2
8
18
18
4
2
3
2
4
2
8
3
2
8
4
2
8
18
32
18
4
2
8
18
32
18
5
2
8
18
32
32
18
4
2
8
18
32
32
18
5
2
8
18
32
18
6
2
8
18
32
18
7
2
8
18
32
32
18
6
2
8
18
32
32
18
7
2
8
18
5
2
8
18
6
2
8
18
18
5
2
8
18
18
6
2
8
18
7
2
8
18
8
2
8
18
18
7
2
8
18
18
8
2
5
2
6
2
8
5
2
8
6
2
7
2
8
2
8
7
2
8
8
2
8
18
32
18
8
2
8
18
32
32
18
8
2
2
8
18
32
8
2
2
8
18
32
32
8
2
2
8
18
32
9
2
2
8
18
32
32
8
3
2
8
18
30
8
2
2
8
18
32
30
8
2
2
8
18
31
8
2
2
8
18
32
31
8
2
2
8
18
28
8
2
2
8
18
32
28
8
2
2
8
18
29
8
2
2
8
18
32
29
8
2
2
8
18
32
15
2
2
8
18
32
32
15
2
2
8
15
2
2
8
16
2
2
8
18
16
1
2
8
18
18
2
8
18
32
17
1
2
8
18
32
18
1
2
8
18
32
32
17
1
2
8
18
32
32
18
1
2
8
18
1
2
8
18
2
2
8
18
18
1
2
8
18
18
2
2
8
18
32
18
2
2
8
18
32
32
18
2
2
8
18
24
8
2
2
8
18
32
24
8
2
2
8
18
25
8
2
2
8
18
32
25
8
2
2
8
18
25
9
2
2
8
18
32
25
9
2
2
8
18
27
8
2
2
8
18
32
27
8
2
2
8
14
2
2
8
18
15
1
2
8
18
32
14
2
2
8
18
32
32
14
2
2
8
18
23
8
2
2
8
18
32
22
9
2
2
8
18
32
13
2
2
8
18
32
32
13
2
2
8
13
2
2
8
18
13
2
2
8
18
22
8
2
2
8
18
32
21
9
2
2
8
13
1
2
8
18
13
1
2
8
18
32
12
2
2
8
18
32
32
12
2
2
8
18
21
8
2
2
8
18
32
20
9
2
2
8
11
2
2
8
18
12
1
2
8
18
32
11
2
2
8
18
32
32
11
2
2
8
18
19
9
2
2
8
18
32
18
10
2
2
8
10
2
2
8
18
10
2
2
8
18
32
10
2
2
8
18
32
32
10
2
2
8
18
18
9
2
2
8
18
32
18
9
2
1
2
1
2
8
1
2
8
8
1
2
8
18
8
1
2
8
18
18
8
1
2
8
18
32
18
8
1
2
8
9
2
2
8
18
9
2
2
2
2
8
2
2
8
8
2
2
8
18
8
2
2
8
18
18
8
2
2
8
18
32
18
8
2
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
H
Li Be
Na Mg
K Ca
Rb Sr
Sc Ti
Y Zr
V Cr
Nb Mo
Cs Ba
Fr Ra
Hf Ta
Rf Db
W Re
Sg Bh
Mn Fe
Tc Ru
Os Ir
Hs Mt
Co Ni
Rh Pd
Pt Au
Ds Rg
Cu Zn
Ag Cd
Hg Tl
Cn Nh
Ga Ge
In Sn
B C
Al Si
Pb Bi
Fl Mc
Po At
Lv Ts
As Se
Sb Te
Br Kr
I Xe
N O
P S
F Ne
Cl Ar
Rn
Og
He
Yb
No
Lu
Lr
Er
Fm
Tm
Md
Dy
Cf
Ho
Es
La
Ac
Ce
Th
Pr
Pa
Nd
U
Pm
Np
Sm
Pu
Eu
Am
Gd
Cm
Tb
Bk
Symbol
Rutherfordium
Dubnium
Seaborgium
Bohrium
Hassium
Meitnerium
Darmstadtium
Roentgenium
Copernicium
Nihonium
Flerovium
Moscovium
Livermorium
Tennessine
Oganesson
Nobelium
Lawrencium
Fermium
Mendelevium
Californium Einsteinium
Actinium
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Americium
Curium
Berkelium
Hydrogen
Lithium
Beryllium
Sodium
Magnesium
Potassium
Calcium
Rubidium
Strontium
Scandium
Titanium
Yttrium
Zirconium
Vanadium
Chromium
Niobium
Molybdenum
Caesium
Barium
Francium
Radium
Hafnium
Tantalum Tungsten Rhenium
Manganese
Iron
Technetium
Ruthenium
Osmium Iridium
Cobalt
Nickel
Rhodium
Palladium
Platinum
Gold
Copper Zinc
Silver
Cadmium
Mercury Thallium
Gallium
Germanium
Indium Tin
Boron Carbon
Aluminium
Silicon
Lead Bismuth
Polonium
Astatine
Arsenic
Selenium
Antimony
Tellurium
Bromine Krypton
Iodine Xenon
Nitrogen Oxygen
Phosphorus
Sulfur
Fluorine Neon
Chlorine Argon
Radon
Helium
Ytterbium
LutetiumErbium Thulium
Dysprosium
Holmium
Lanthanum
Cerium
Praseodymium
Neodymium Promethium
Samarium
Europium
Gadolinium
Terbium
Name
(
267
) (
268
) (
269
) (
270
) (
277
) (
278
) (
281
) (
282
) (
285
) (
286
) (
289
) (
290
) (
293
) (
294
) (
294
)
(
259
) (
266
)(
257
) (
258
)(
251
) (
252
)(
227
)
232.04 231.04 238.03
(
237
) (
244
) (
243
) (
247
) (
247
)
1.008
6.94 9.0122
22.990 24.305
39.098 40.078
85.468 87.62
44.956 47.867
88.906 91.224
50.942 51.996
92.906 95.95
132.91 137.33
(
223
) (
226
)
178.49 180.95 183.84 186.21
54.938 55.845
(
98
)
101.07
190.23 192.22
58.933
58.693
102.91 106.42
195.08 196.97
63.546 65.38
107.87 112.41
200.59 204.38
69.723 72.630
114.82 118.71
10.81 12.011
26.982 28.085
207.2 208.98
(
209
) (
210
)
74.922 78.971
121.76 127.60
79.904 83.798
126.90 131.29
14.007 15.999
30.974 32.06
18.998 20.180
35.45 39.948
(
222
)
4.0026
173.05 174.97167.26 168.93162.50 164.93138.91 140.12 140.91 144.24
(
145
)
150.36 151.96 157.25 158.93
Weight
For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.
1
3 4
11 12
19 20
37 38
21 22
39 40
23 24
41 42
55 56
87 88
72 73
104 105
74 75
106 107
25 26
43 44
76 77
108 109
27 28
45 46
78 79
110 111
29 30
47 48
80 81
112 113
31 32
49 50
5 6
13 14
82 83
114 115
84 85
116 117
33 34
51 52
35 36
53 54
7 8
15 16
9 10
17 18
86
118
2
70
102
71
103
68
100
69
101
66
98
67
99
57
89
58
90
59
91
60
92
61
93
62
94
63
95
64
96
65
97
Atomic #
Actinoids
(Actinides)
Lanthanoids
(Lanthanides)
Noble gases
Other
nonmetals
Post-transition
metals
Transition
metals
Alkaline earth
metals
Alkali metals
Nonmetals
Metalloids
Metals
Unknown
Rf
Gas
H
Liquid
Hg
Solid
C
1
2
3
4
5
6
7
6
7
HalogensChalcogensPnictogens
181716151413121110987654321
PERIODIC TABLE OF ELEMENTS
