Am
2
8
18
32
25
8
2
Cm
Neptunium Plutonium Americium Curium
(237)
(244)
(243)
(247)
2
8
18
32
25
9
2
97
Bk
2
8
18
32
27
8
2
98
Cf
2
8
18
32
28
8
2
99
Es
2
8
18
32
29
8
2
100
Fm
2
8
18
32
30
8
2
101
Md
2
8
18
32
31
8
2
102
No
2
8
18
32
32
8
2
103
Lr
2
8
18
32
32
8
3
104
Rf
2
8
18
32
32
10
2
Db
2
8
18
32
32
11
2
106
Sg
2
8
18
32
32
12
2
107
Bh
Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium
(247)
(251)
(252)
(257)
(258)
(259)
(266)
(267)
(268)
(269)
(270)
2
8
18
32
32
13
2
108
Hs
2
8
18
32
32
14
2
109
Mt
2
8
18
32
32
15
2
Pt
2
8
18
32
17
1
Au
Platinum Gold
195.08
196.97
110
Ds
2
8
18
32
32
17
1
111
Rg
2
8
18
32
32
18
1
Hg
Mercury
200.59
112
Cn
2
8
18
32
32
18
2
Tl
Thallium
204.38
113
Nh
2
8
18
32
32
18
3
82
Pb
Lead
207.2
114
Fl
2
8
18
32
18
4
2
8
18
32
32
18
4
G
2
8
18
7
35
Br
52
Te
2
8
18
18
6
N
Selenium Bromine
78.971
79.904
2
8
18
18
7
53
I
2
8
18
32
18
5
83
Bi
Bismuth
208.98
115
Mc
2
8
18
32
32
18
5
84
Po
2
8
18
32
18
6
N
M
M
Antimony Tellurium Iodine
121.76
127.60
126.90
2
8
18
32
18
7
85
At
Polonium Astatine
(209)
(210)
116
Lv
2
8
18
32
32
18
6
117
Ts
2
8
18
32
32
18
7
G
G
Argon
39.948
2
8
18
8
36
Kr
Krypton
83.798
2
8
18
18
8
54
Xe
Xenon
131.29
2
8
18
32
18
8
86
Rn
Radon
(222)
118
Og
2
8
18
32
32
18
8
Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
(277)
(278)
(281)
(282)
(285)
(286)
(289)
(290)
(293)
(294)
(294)
Design Copyright © 2017 Michael Dayah (michael@dayah.com). For a fully interactive desktop, tablet, and mobile-friendly version in 50 languages with trend visualization of 30 properties, 3-D orbitals, isotopes, compound mixing, lesson plans, free printouts, and posters in all sizes, visit Ptable.com.
Meija, J., Coplen, T., Berglund, M., et al. (2016). Atomic
weights of the elements 2013 (IUPAC Technical Report).
Pure and Applied Chemistry, 88(3), pp. 265-291.
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
G
2
8
18
6
2
8
8
18
Ar
Chlorine
35.45
N
N
Cl
Neon
20.180
K
L
M
N
O
P
Q
G
Sb
Se
2
8
7
17
N
M
2
8
18
18
5
51
34
N
N
N
As
M
P
2
8
18
32
18
3
81
N
M
P
2
8
18
32
18
2
80
Sn
Tin
118.71
2
8
18
18
4
P
T
2
8
18
32
18
1
79
2
8
18
5
33
Fluorine
18.998
K
L
M
N
O
P
Q
K
L
M
N
O
P
Q
G
Iridium
192.22
T
T
Ir
78
In
Cadmium Indium
112.41
114.82
S
Phosphorus Sulfur
30.974
32.06
Germanium Arsenic
72.630
74.922
50
2
8
6
2
8
10
Ne
M
Os
2
8
18
32
15
2
77
2
8
18
18
3
49
F
Oxygen
15.999
16
Helium
4.0026
2
7
9
P
Re
2
8
18
32
14
2
76
Cd
Gallium
69.723
Ge
2
8
5
P
2
8
18
32
13
2
75
T
W
2
8
18
32
12
2
T
74
2
8
18
18
2
48
Ga
2
8
18
4
32
Nitrogen
14.007
15
2
6
8
He
17
O
P
P
Ag
Zinc
65.38
2
8
18
3
31
P
2
8
18
18
1
47
Zn
T
Copper
63.546
2
8
18
2
30
2
8
4
14
Si
P
Pd
2
8
18
18
Cu
T
T
46
2
8
18
1
29
Carbon
12.011
N
M
2
8
3
2
5
7
Halogens
16
N
Aluminium Silicon
26.982
28.085
T
Rh
Nickel
58.693
12
Molybdenum Technetium Ruthenium Rhodium Palladium Silver
(98)
95.95
101.07
102.91
106.42
107.87
Tantalum Tungsten Rhenium Osmium
180.95
183.84
186.21
190.23
105
2
8
18
16
1
45
2
8
16
2
28
Ni
11
2
4
6
C
Al
T
Ru
Cobalt
58.933
T
T
T
T
Tc
2
8
18
15
1
44
Co
T
T
Ta
2
8
18
32
11
2
2
8
18
13
2
43
2
8
15
2
27
T
Hafnium
178.49
73
Mo
2
8
18
13
1
T
Nb
42
T
T
T
2
8
18
12
1
41
T
Ytterbium Lutetium
173.05
174.97
Hf
Fe
T
Lu
2
8
18
32
10
2
Mn
2
8
14
2
26
Vanadium Chromium Manganese Iron
50.942
51.996
54.938
55.845
Zirconium Niobium
91.224
92.906
72
2
8
13
2
25
T
2
8
18
32
9
2
71
L
L
L
96
2
3
15
2
2
P
95
Boron
10.81
T
Pu
2
8
18
32
24
8
2
Thulium
168.93
Yb
2
8
18
32
8
2
Cr
2
8
13
1
10
14
B
Rf Unknown
9
T
94
Dysprosium Holmium Erbium
162.50
164.93
167.26
Tm
70
24
8
T
Np
2
8
18
32
22
9
2
L
L
93
Er
2
8
18
31
8
2
69
H Gas
7
T
U
Protactinium Uranium
231.04
238.03
2
8
18
32
21
9
2
2
8
18
30
8
2
68
Zr
V
T
92
Ho
2
8
18
29
8
2
2
8
18
10
2
40
2
8
11
2
T
Y
Yttrium
88.906
T
Pa
2
8
18
32
20
9
2
67
Ti
6
23
T
2
8
18
9
2
39
A
91
L
L
Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium
(145)
140.91
144.24
150.36
151.96
157.25
158.93
Dy
2
8
18
28
8
2
2
8
10
2
22
Scandium Titanium
44.956
47.867
L
Tb
66
L
Gd
2
8
18
27
8
2
65
L
2
8
18
25
9
2
64
L
Eu
2
8
18
25
8
2
5
T
M
P
L
A
63
L
Sm
2
8
18
24
8
2
A
Th
Actinium Thorium
(227)
232.04
2
8
18
32
18
10
2
62
A
90
Pm
2
8
18
23
8
2
A
Ac
2
8
18
32
18
9
2
Nd
61
A
E
K
89
2
8
18
22
8
2
60
A
Ra
Francium Radium
(223)
(226)
2
8
18
32
18
8
2
Lanthanum Cerium
138.91
140.12
Pr
2
8
18
21
8
2
A
88
Ce
59
A
7 Fr
2
8
18
32
18
8
1
2
8
18
19
9
2
58
A
87
E
K
Caesium Barium
132.91
137.33
La
2
8
18
18
9
2
A
Ba
57
L
2
8
18
18
8
2
56
2
8
9
2
Sc
For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.
L
6 Cs
2
8
18
18
8
1
4
21
E
K
55
3
A
Sr
Rubidium Strontium
85.468
87.62
13
13
T
2
8
18
8
2
38
A
5 Rb
2
8
18
8
1
E
K
37
E
Ptable
.com
Potassium Calcium
39.098
40.078
K
E
K
K
E
Ca
Actinoids
(Actinides)
Hg Liquid
C Solid
Noble gases
2
8
8
2
20
Pnictogens Chalcogens
5
Nonmetals
Other
nonmetals
4 K
2
8
8
1
Magnesium
24.305
Post-transition
metals
Mg
Sodium
22.990
19
12
Lanthanoids
(Lanthanides)
Transition
metals
3 Na
2
8
2
Alkaline earth
metals
2
8
1
Beryllium
9.0122
Alkali metals
Lithium
6.94
11
Metals
Be
Metalloids
2 Li
2
2
4
A
2
1
3
T
N
Hydrogen Name
1.008
Weight
PERIODIC TABLE OF ELEMENTS
G
Symbol
L
1 H
Atomic
A
1
18
K
L
M
N
O
P
Q
A
1
N
2
T
1
K
L
M
N
O
P
Q