Radioactive
1
H
Hydrogen
No
2
He
Helium
No
3
Li
Lithium
No
4
Be
Beryllium
No
5
B
Boron
No
6
C
Carbon
No
7
N
Nitrogen
No
8
O
Oxygen
No
9
F
Fluorine
No
10
Ne
Neon
No
11
Na
Sodium
No
12
Mg
Magnesium
No
13
Al
Aluminium
No
14
Si
Silicon
No
15
P
Phosphorus
No
16
S
Sulphur
No
17
Cl
Chlorine
No
18
Ar
Argon
No
19
K
Potassium
No
20
Ca
Calcium
No
21
Sc
Scandium
No
22
Ti
Titanium
No
23
V
Vanadium
No
24
Cr
Chromium
No
25
Mn
Manganese
No
26
Fe
Iron
No
27
Co
Cobalt
No
28
Ni
Nickel
No
29
Cu
Copper
No
30
Zn
Zinc
No
31
Ga
Galium
No
32
Ge
Germanium
No
33
As
Arsenic
No
34
Se
Selenium
No
35
Br
Bromine
No
36
Kr
Krypton
No
37
Rb
Rubidium
No
38
Sr
Strontium
No
39
Y
Yttrium
No
40
Zr
Zirconium
No
41
Nb
Niobium
No
42
Mo
Molybdenum
No
43
Tc
Technetium
Yes
44
Ru
Ruthenium
No
45
Rh
Rhodium
No
46
Pd
Palladium
No
47
Ag
Silver
No
48
Cd
Cadmium
No
49
In
Indium
No
50
Sn
Tin
No
51
Sb
Antimony
No
52
Te
Tellurium
No
53
I
Iodine
No
54
Xe
Xenon
No
55
Cs
Caesium
No
56
Ba
Barium
No
57
La
Lanthanum
No
58
Ce
Cerium
No
59
Pr
Praseodymium
No
60
Nd
Neodymium
No
61
Pm
Promethium
Yes
62
Sm
Samarium
No
63
Eu
Europium
No
64
Gd
Gadolinium
No
65
Tb
Terbium
No
66
Dy
Dysprosium
No
67
Ho
Holmium
No
68
Er
Erbium
No
69
Tm
Thulium
No
70
Yb
Ytterbium
No
71
Lu
Lutetium
No
72
Hf
Hafnium
No
73
Ta
Tantalum
No
74
W
Tungsten
No
75
Re
Rhenium
No
76
Os
Osmium
No
77
Ir
Iridium
No
78
Pt
Platinum
No
79
Au
Gold
No
80
Hg
Mercury
No
81
Tl
Thallium
No
82
Pb
Lead
No
83
Bi
Bismuth
Yes
84
Po
Polonium
Yes
85
At
Astatine
Yes
86
Rn
Radon
Yes
87
Fr
Francium
Yes
88
Ra
Radium
Yes
89
Ac
Actinium
Yes
90
Th
Thorium
Yes
91
Pa
Protactinium
Yes
92
U
Uranium
Yes
93
Np
Neptunium
Yes
94
Pu
Plutonium
Yes
94
Am
Americium
Yes
96
Cm
Curium
Yes
97
Bk
Berkelium
Yes
98
Cf
Californium
Yes
99
Es
Einsteinium
Yes
100
Fm
Fermium
Yes
101
Md
Mendelevium
Yes
102
No
Nobelium
Yes
103
Lw
Lawrencium
Yes
104
Rf
Rutherfordium
Yes
105
Db
Dubnium
Yes
106
Sg
Seaborgium
Yes
107
Bh
Bohrium
Yes
108
Hs
Hassium
Yes
109
Mt
Meitnerium
Yes
110
Ds
Darmstadtium
Yes
111
Rg
Roentgenium
Yes
112
Cn
Copernicium
Yes
113
Nh
Nihonium
Yes
114
Fl
Flerovium
Yes
115
Mc
Moscovium
Yes
116
Lv
Livermorium
Yes
117
Ts
Tennessine
Yes
118
Og
Oganesson
Yes