A stable isotope is a form of an element which is not radioactive. Isotopes are atoms of a chemical element whose nuclei have the same atomic number, Z, but different atomic weights, A. The word isotope, meaning at the same place, comes from the fact that isotopes are located at the same place on the periodic table. ... Generally, an element is a basic part that is the foundation of something. ... Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles. ...

All elements from hydrogen to lead come in both stable and unstable forms (with the exceptions of technetium, tungsten and promethium). All elements heavier than lead, beginning with bismuth, are only found in radioactive isotopes. Note that tungsten and bismuth do have isotopes which are very slightly radioactive; these have been excluded from this list, which strictly limits to entirely stable entities. General Name, Symbol, Number Hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1 , s Density, Hardness 0. ... General Name, Symbol, Number Lead, Pb, 82 Chemical series Poor metals Group, Period, Block 14(IVA), 6 , p Density, Hardness 11340 kg/m3, 1. ... A radionuclide is an atom with an unstable nucleus. ... General Name, Symbol, Number technetium, Tc, 43 Chemical series Transition metals Group, Period, Block 7, 5, d Density, Hardness 11500 kg/m3, NA Appearance Silvery gray metallic Atomic properties Atomic mass [98] u Atomic radius (calc. ... General Name, Symbol, Number Tungsten, W, 74 Chemical series Transition metals Group, Period, Block 6 (VIB), 6, d Density, Hardness 19250 kg/m3, 7. ... General Name, Symbol, Number Promethium, Pm, 61 Chemical series Lanthanides Group, Period, Block _ , 6 , f Density, Hardness 7264 kg/m3, no data Appearance metallic Atomic properties Atomic weight 145 u Atomic radius (calc. ... General Name, Symbol, Number Lead, Pb, 82 Chemical series Poor metals Group, Period, Block 14(IVA), 6 , p Density, Hardness 11340 kg/m3, 1. ... General Name, Symbol, Number Bismuth, Bi, 83 Chemical series Poor metals Group, Period, Block 15 (VA), 6, p Density, Hardness 9. ... General Name, Symbol, Number Tungsten, W, 74 Chemical series Transition metals Group, Period, Block 6 (VIB), 6, d Density, Hardness 19250 kg/m3, 7. ... General Name, Symbol, Number Bismuth, Bi, 83 Chemical series Poor metals Group, Period, Block 15 (VA), 6, p Density, Hardness 9. ...

1. Hydrogen-1
2. Hydrogen-2
3. Helium-3
4. Helium-4
5. Lithium-6
6. Lithium-7
7. Beryllium-9
8. Boron-10
9. Boron-11
10. Carbon-12
11. Carbon-13
12. Nitrogen-14
13. Nitrogen-15
14. Oxygen-16
15. Oxygen-17
16. Oxygen-18
17. Fluorine-19
18. Neon-20
19. Neon-21
20. Neon-22
21. Sodium-23
22. Magnesium-24
23. Magnesium-25
24. Magnesium-26
25. Aluminium-27
26. Silicon-28
27. Silicon-29
28. Silicon-30
29. Phosphorus-31
30. Sulfur-32
31. Sulfur-33
32. Sulfur-34
33. Sulfur-36
34. Chlorine-35
35. Chlorine-37
36. Argon-36
37. Argon-38
38. Argon-40
39. Potassium-39
40. Potassium-41
41. Calcium-40
42. Calcium-42
43. Calcium-43
44. Calcium-44
45. Calcium-46
46. Calcium-48
47. Scandium-45
48. Titanium-46
49. Titanium-47
50. Titanium-48
51. Titanium-49
52. Titanium-50
53. Vanadium-50
54. Vanadium-51
55. Chromium-50
56. Chromium-52
57. Chromium-53
58. Chromium-54
59. Manganese-55
60. Iron-54
61. Iron-56
62. Iron-57
63. Iron-58
64. Cobalt-59
65. Nickel-58
66. Nickel-60
67. Nickel-61
68. Nickel-62
69. Nickel-64
70. Copper-63
71. Copper-65
72. Zinc-64
73. Zinc-66
74. Zinc-67
75. Zinc-68
76. Zinc-70
77. Gallium-69
78. Gallium-71
79. Germanium-70
80. Germanium-72
81. Germanium-73
82. Germanium-74
83. Germanium-76
84. Arsenic-75
85. Selenium-74
86. Selenium-76
87. Selenium-77
88. Selenium-78
89. Selenium-80
90. Selenium-82
91. Bromine-79
92. Bromine-81
93. Krypton-78
94. Krypton-80
95. Krypton-82
96. Krypton-83
97. Krypton-84
98. Krypton-86
99. Rubidium-85
100. Rubidium-87
101. Strontium-84
102. Strontium-86
103. Strontium-87
104. Strontium-88
105. Yttrium-89
106. Zirconium-90
107. Zirconium-91
108. Zirconium-92
109. Zirconium-94
110. Zirconium-96
111. Niobium-93
112. Molybdenum-92
113. Molybdenum-94
114. Molybdenum-95
115. Molybdenum-96
116. Molybdenum-97
117. Molybdenum-98
118. Molybdenum-100
119. Technetium - No stable isotopes
120. Ruthenium-96
121. Ruthenium-98
122. Ruthenium-99
123. Ruthenium-100
124. Ruthenium-101
125. Ruthenium-102
126. Ruthenium-104
127. Rhodium-103
128. Palladium-102
129. Palladium-104
130. Palladium-105
131. Palladium-106
132. Palladium-108
133. Palladium-110
134. Silver-107
135. Silver-109
136. Cadmium-106
137. Cadmium-108
138. Cadmium-110
139. Cadmium-111
140. Cadmium-112
141. Cadmium-113
142. Cadmium-114
143. Cadmium-116
144. Indium-113
145. Indium-115
146. Tin-112
147. Tin-114
148. Tin-115
149. Tin-116
150. Tin-117
151. Tin-118
152. Tin-119
153. Tin-120
154. Tin-122
155. Tin-124
156. Antimony-121
157. Antimony-123
158. Tellurium-120
159. Tellurium-122
160. Tellurium-123
161. Tellurium-124
162. Tellurium-126
163. Tellurium-128
164. Tellurium-130
165. Iodine-127
166. Xenon-124
167. Xenon-126
168. Xenon-128
169. Xenon-129
170. Xenon-130
171. Xenon-131
172. Xenon-132
173. Xenon-134
174. Xenon-136
175. Caesium-133
176. Barium-130
177. Barium-132
178. Barium-134
179. Barium-135
180. Barium-136
181. Barium-137
182. Barium-138
183. Lanthanum-138
184. Lanthanum-139
185. Cerium-136
186. Cerium-138
187. Cerium-140
188. Cerium-142
189. Praseodymium-141
190. Neodymium-142
191. Neodymium-143
192. Neodymium-144
193. Neodymium-145
194. Neodymium-146
195. Neodymium-148
196. Neodymium-150
197. Promethium - No stable isotopes
198. Samarium-144
199. Samarium-147
200. Samarium-148
201. Samarium-149
202. Samarium-150
203. Samarium-152
204. Samarium-154
205. Europium-151
206. Europium-153
207. Gadolinium-152
208. Gadolinium-154
209. Gadolinium-155
210. Gadolinium-156
211. Gadolinium-157
212. Gadolinium-158
213. Gadolinium-160
214. Terbium-159
215. Dysprosium-156
216. Dysprosium-158
217. Dysprosium-160
218. Dysprosium-161
219. Dysprosium-162
220. Dysprosium-163
221. Dysprosium-164
222. Holmium-165
223. Erbium-162
224. Erbium-164
225. Erbium-166
226. Erbium-167
227. Erbium-168
228. Erbium-170
229. Thulium-169
230. Ytterbium-168
231. Ytterbium-170
232. Ytterbium-171
233. Ytterbium-172
234. Ytterbium-173
235. Ytterbium-174
236. Ytterbium-176
237. Lutetium-175
238. Lutetium-176
239. Hafnium-174
240. Hafnium-176
241. Hafnium-177
242. Hafnium-178
243. Hafnium-179
244. Hafnium-180
245. Tantalum-180
246. Tantalum-181
247. Tungsten-180
248. Rhenium-185
249. Rhenium-187
250. Osmium-184
251. Osmium-186
252. Osmium-187
253. Osmium-188
254. Osmium-189
255. Osmium-190
256. Osmium-192
257. Iridium-191
258. Iridium-193
259. Platinum-190
260. Platinum-192
261. Platinum-194
262. Platinum-195
263. Platinum-196
264. Platinum-198
265. Gold-197
266. Mercury-196
267. Mercury-198
268. Mercury-199
269. Mercury-200
270. Mercury-201
271. Mercury-202
272. Mercury-204
273. Thallium-203
274. Thallium-205
275. Lead-204
276. Lead-206
277. Lead-207
278. Lead-208

No elements with an atomic number greater than 82 have any naturally occurring stable isotopes. In chemistry, protium is the most common isotope of the element hydrogen that has one proton and no neutrons. ... Deuterium (symbol 2H) is a stable isotope of hydrogen with a natural abundance of one atom in 6500 of hydrogen. ... Helium-3 is a non-radioactive and light isotope of helium. ... Helium-4 is a non-radioactive and light isotope of helium. ... General Name, Symbol, Number Lithium, Li, 3 Series Alkali metal Group, Period, Block 1(IA), 2, s Density, Hardness 535 kg/m3, 0. ... General Name, Symbol, Number Beryllium, Be, 4 Series Alkaline earth metals Group, Period, Block 2 (IIA), 2, s Density, Hardness 1848 kg/m3, 5. ... General Name, Symbol, Number Boron, B, 5 Series Metalloids Group, Period, Block 13 (IIIA), 2, p Density, Hardness 2460 kg/m3, 9. ... Carbon 12 is a stable isotope of the element carbon. ... Carbon-13 is a stable isotope of carbon. ... Nitrogen-14 is a stable, non-radioactive isotope of the nitrogen element. ... General Name, Symbol, Number Oxygen, O, 8 Chemical series nonmetals Group, Period, Block 16 (VIA), 2, p Density, Hardness 1. ... General Name, Symbol, Number Fluorine, F, 9 Series Halogens Group, Period, Block 17 (VIIA), 2, p Density, Hardness 1. ... General Name, Symbol, Number Neon, Ne, 10 Chemical series Noble gases Group, Period, Block 18 (VIIIA), 2, p Density, Hardness 0. ... General Name, Symbol, Number sodium, Na, 11 Series alkali metal Group, Period, Block 1 (IA), 3, s Density, Hardness 968 kg/m3, 0. ... General Name, Symbol, Number magnesium, Mg, 12 Series alkaline earth metals Group, Period, Block 2 (IIA), 3, s Density, Hardness 1738 kg/m³, 2. ... General Name, Symbol, Number aluminium, Al, 13 Chemical series poor metals Group, Period, Block 13 (IIIA), 3, p Density, Hardness 2700 kg/m3, 2. ... General Name, Symbol, Number silicon, Si, 14 Series metalloid Group, Period, Block 14 (IVA), 3, p Density, Hardness 2330 kg/m3, 6. ... This article is about the chemical element. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16 (VIA), 3, p Density, Hardness 1960 kg/m3, 2 Appearance Lemon yellow at STP Atomic properties Atomic weight 32. ... General Name, Symbol, Number chlorine, Cl, 17 Series halogens Group, Period, Block 17 (VIIA), 3, p Density, Hardness 3. ... General Name, Symbol, Number argon, Ar, 18 Chemical series noble gases Group, Period, Block 18 (VIIIA), 3, p Density, Hardness 1. ... General Name, Symbol, Number potassium, K, 19 Series alkali metals Group, Period, Block 1(IA), 4, s Density, Hardness 856 kg/m3, 0. ... General Name, Symbol, Number calcium, Ca, 20 Series alkaline earth metal Group, Period, Block 2 (IIA), 4, s Density, Hardness 1550 kg/m3, 1. ... General Name, Symbol, Number scandium, Sc, 21 Chemical series transition metals Group, Period, Block 3, 4 , d Density, Hardness 2985 kg/m3, U/K Appearance Silvery white Atomic properties Atomic weight 44. ... General Name, Symbol, Number Titanium, Ti, 22 Chemical series transition metals Group, Period, Block 4, 4, d Density, Hardness 4507 kg/m3, 6 Appearance Silvery metallic Atomic properties Atomic weight 47. ... General Name, Symbol, Number vanadium, V, 23 Chemical series transition metals Group, Period, Block 5 , 4 , d Density, Hardness 6110 kg/m3, 7. ... General Name, Symbol, Number chromium, Cr, 24 Chemical series transition metals Group, Period, Block 6 (VIB), 4, d Appearance silvery metallic Atomic properties Atomic weight 51. ... General Name, Symbol, Number manganese, Mn, 25 Chemical series transition metals Group, Period, Block 7 , 4, d Density, Hardness 7470 kg/m3, 6. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metal Group, Period, Block 8 (VIIIB), 4, d Density, Hardness 7874 kg/m3, 4. ... General Name, Symbol, Number cobalt, Co, 27 Chemical series transition metals Group, Period, Block 9 , 4, d Density, Hardness 8. ... General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10 , 4, d Density, Hardness 8908 kg/m³, 4. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11 , 4, d Density, Hardness 8920 kg/m3, 3. ... General Name, Symbol, Number zinc, Zn, 30 Chemical series transition metals Group, Period, Block 12, 4, d Density, Hardness 7140 kg/m3, 2. ... General Name, Symbol, Number gallium, Ga, 31 Chemical series poor metals Group, Period, Block 13 (IIIA), 4 , p Density, Hardness 5904 kg/m3, 1. ... General Name, Symbol, Number germanium, Ge, 32 Series metalloids Group, Period, Block 14 (IVA), 4, p Density, Hardness 5323 kg/m3, 6 Appearance greyish white Atomic properties Atomic weight 72. ... General Name, Symbol, Number arsenic, As, 33 Series metalloids Group, Period, Block 15 (VA), 4, p Density, Hardness 5727 kg/m3, 3. ... General Name, Symbol, Number selenium, Se, 34 Series nonmetals Group, Period, Block 16 (VIA), 4, p Density, Hardness 4790 kg/m3(300K), 2 Appearance grey, metallic lustre Atomic properties Atomic weight 78. ... General Name, Symbol, Number bromine, Br, 35 Series halogens Group, Period, Block 17 (VIIA), 4, p Density, Hardness 3119 kg/m3 (300 K), NA Appearance Gas: red-brown solid: metallic luster Atomic properties Atomic weight 79. ... General Name, Symbol, Number krypton, Kr, 36 Chemical series Noble gases Group, Period, Block 18 (VIIIA), 4 , p Density, Hardness 3. ... General Name, Symbol, Number Rubidium, Rb, 37 Series Alkali metals Group, Period, Block 1(IA), 5, s Density, Hardness 1532 kg/m3, 0. ... General Name, Symbol, Number Strontium, Sr, 38 Series Alkaline earth metal Group, Period, Block 2 (IIA), 5, s Density, Hardness 2630 kg/m3, 1. ... Full table General Name, Symbol, Number Yttrium, Y, 39 Chemical series transition metals Group, Period, Block 3 (IIIB), 5, d Density, Hardness 4472 kg/m3, __ Appearance Silvery white Atomic Properties Atomic weight 88. ... General Name, Symbol, Number Zirconium, Zr, 40 Chemical series transition metals Group, Period, Block 4, 5, d Density, Hardness 6511 kg/m3, 5 Appearance Silvery white Atomic properties Atomic weight 91. ... General Name, Symbol, Number Niobium, Nb, 41 Chemical series Transition metals Group, Period, Block 5, 5 , d Density, Hardness 8570 kg/m3, 6 Appearance grey metallic Atomic properties Atomic weight 92. ... General Name, Symbol, Number molybdenum, Mo, 42 Chemical series transition metal Group, Period, Block 6 (VIB), 5, d Density, Hardness 10280 kg/m3, 5. ... General Name, Symbol, Number technetium, Tc, 43 Chemical series Transition metals Group, Period, Block 7, 5, d Density, Hardness 11500 kg/m3, NA Appearance Silvery gray metallic Atomic properties Atomic mass [98] u Atomic radius (calc. ... General Name, Symbol, Number ruthenium, Ru, 44 Chemical series Transition metals Group, Period, Block 8, 5 , d Density, Hardness 12370 kg/m3, 6. ... General Name, Symbol, Number rhodium, Rh, 45 Chemical series Transition metals Group, Period, Block 9, 5 , d Density, Hardness 12450 kg/m3, 6 Appearance Silvery white metallic Atomic properties Atomic weight 102. ... This article describes the chemical element palladium. ... General Name, Symbol, Number silver, Ag, 47 Chemical series Transition metals Group, Period, Block 11, 5, d Density, Hardness 10490 kg/m3, 2. ... General Name, Symbol, Number Cadmium, Cd, 48 Chemical series Transition metals Group, Period, Block 12, 5, d Density, Hardness 8650 kg/m3, 2 Appearance Silvery gray metallic Atomic properties Atomic weight 112. ... General Name, Symbol, Number indium, In, 49 Chemical series Poor metals Group, Period, Block 13 (IIIA), 5, p Density, Hardness 7310 kg/m3, 1. ... General Name, Symbol, Number tin, Sn, 50 Chemical series poor metals Group, Period, Block 14 (IVA), 5, p Density, Hardness 7310 kg/m3, 1. ... General Name, Symbol, Number antimony, Sb, 51 Series metalloids Group, Period, Block 15 (VA), 5, p Density, Hardness 6697 kg/m3, 3 Appearance silvery lustrous grey Atomic properties Atomic weight 121. ... General Name, Symbol, Number tellurium, Te, 52 Series metalloids Group, Period, Block 16 (VIA), 5, p Density, Hardness 6240 kg/m3, 2. ... General Name, Symbol, Number iodine, I, 53 Series halogens Group, Period, Block 17 (VIIA), 5, p Density, Hardness 4940 kg/m3, no data Appearance violet-dark grey, lustrous Atomic properties Atomic weight 126. ... General Name, Symbol, Number xenon, Xe, 54 Chemical series Noble gases Group, Period, Block 18 (VIIIA), 5, p Density, Hardness 5. ... General Name, Symbol, Number Caesium, Cs, 55 Series Alkali metals Group, Period, Block 1(IA), 6, s Density, Hardness 1879 kg/m3, 0. ... Barium is also the Latin name for the city Bari in Italy. ... General Name, Symbol, Number Lanthanum, La, 57 Chemical series Lanthanides Group, Period, Block 3 , 6 , f Density, Hardness 6146 kg/m3, 2. ... General Name, Symbol, Number Praseodymium, Pr, 59 Chemical series Lanthanides Group, Period, Block _ , 6 , f Density, Hardness 6640 kg/m3, no data Appearance silvery white, yellowish tinge Atomic properties Atomic weight 140. ... General Name, Symbol, Number Neodymium, Nd, 60 Chemical series Lanthanides Group, Period, Block _ , 6, f Density, Hardness 6800 kg/m3, no data Appearance silvery white, yellowish tinge Atomic properties Atomic weight 144. ... General Name, Symbol, Number Promethium, Pm, 61 Chemical series Lanthanides Group, Period, Block _ , 6 , f Density, Hardness 7264 kg/m3, no data Appearance metallic Atomic properties Atomic weight 145 u Atomic radius (calc. ... General Name, Symbol, Number Samarium, Sm, 62 Chemical series Lanthanides Group, Period, Block _ , 6 , f Density, Hardness 7353 kg/m3, no data Appearance silvery white Atomic properties Atomic weight 150. ... General Name, Symbol, Number Europium, Eu, 63 Chemical series Lanthanides Group, Period, Block _, 6, f Density, Hardness 5244 kg/m3, no data Appearance silvery white Atomic properties Atomic weight 151. ... General Name, Symbol, Number Gadolinium, Gd, 64 Chemical series Lanthanides Group, Period, Block _ , 6, f Density, Hardness 7901 kg/m3, no data Appearance silvery white Atomic properties Atomic weight 157. ... General Name, Symbol, Number Terbium, Tb, 65 Chemical series Lanthanides Period, Block 6 , f Density, Hardness 8219 kg/m3, no data Appearance silvery white Atomic properties Atomic weight 158. ... General Name, Symbol, Number Dysprosium, Dy, 66 Chemical series Lanthanides Group, Period, Block _ , 6 , f Density, Hardness 8551 kg/m3, no data Appearance silvery white Atomic properties Atomic weight 162. ... General Name, Symbol, Number Holmium, Ho, 67 Chemical series Lanthanides Group, Period, Block NA, 6 , f Density, Hardness 8800kg/m3, ND Appearance silvery white Atomic properties Atomic weight 164. ... General Name, Symbol, Number Erbium, Er, 68 Chemical series Lanthanides Group, Period, Block NA, 6, f Density, Hardness 9066 kg/m3, ND Appearance silvery white Atomic properties Atomic weight 167. ... General Name, Symbol, Number Thulium, Tm, 69 Chemical series Lanthanides Group, Period, Block NA, 6 , f Density, Hardness 9321 kg/m3, no data Appearance silvery gray Atomic properties Atomic weight 168. ... General Name, Symbol, Number Ytterbium, Yb, 70 Chemical series Lanthanides Group, Period, Block NA, 6, f Density, Hardness 6570 kg/m3, ND Appearance silvery white Atomic properties Atomic weight 173. ... General Name, Symbol, Number Lutetium, Lu, 71 Chemical series Transition metals Group, Period, Block 3, 6 , d Density, Hardness 9841 kg/m3, __ Appearance Silvery white Atomic properties Atomic weight 174. ... General Name, Symbol, Number Hafnium, Hf, 72 Chemical series Transition metals Group, Period, Block 4 (IVB), 6, d Density, Hardness 13310 kg/m3, 5. ... General Name, Symbol, Number Tantalum, Ta, 73 Chemical series Transition metals Group, Period, Block 5 (VB), 6, d Density, Hardness 16650 kg/m3, 6. ... General Name, Symbol, Number Tungsten, W, 74 Chemical series Transition metals Group, Period, Block 6 (VIB), 6, d Density, Hardness 19250 kg/m3, 7. ... General Name, Symbol, Number Rhenium, Re, 75 Chemical series transition metals Group, Period, Block 7 (VIIB), 6, d Density, Hardness 21020 kg/m3, 7 Appearance grayish white Atomic properties Atomic weight 186. ... General Name, Symbol, Number Osmium, Os, 76 Chemical series transition metals Group, Period, Block 8 (VIIIB), 6, d Density, Hardness 22610 kg/m3, 7 Appearance Silvery, Blue Cast Atomic properties Atomic weight 190. ... Alternate meaning: Iridium (satellite) General Name, Symbol, Number Iridium, Ir, 77 Chemical series transition metals Group, Period, Block 9, 6, d Density, Hardness 22650 kg/m3, 6. ... Platinum is also a certification by the RIAA and other world recording industries, see: RIAA certification General Name, Symbol, Number Platinum, Pt, 78 Chemical series transition metals Group, Period, Block 10 , 6, d Density, Hardness 21. ... General Name, Symbol, Number Gold, Au, 79 Chemical series transition metals Group, Period, Block 11 (IB), 6, d Density, Hardness 19. ... General Name, Symbol, Number Mercury, Hg, 80 Chemical series transition metals Group, Period, Block 12 (IIB), 6, d Density, Hardness liquid 13. ... General Name, Symbol, Number Thallium, Tl, 81 Chemical series Poor metals Group, Period, Block 13 (IIIA), 6 , p Density, Hardness 11. ... General Name, Symbol, Number Lead, Pb, 82 Chemical series Poor metals Group, Period, Block 14(IVA), 6 , p Density, Hardness 11340 kg/m3, 1. ...