Surf Wiki
Save to docs
general/isotopes-of-radium

From Surf Wiki (app.surf) — the open knowledge base

Isotopes of radium

none

none

Radium (88Ra) has no stable or nearly stable isotopes, and thus a standard atomic weight cannot be given. The longest lived, and most common, isotope of radium is 226Ra with a half-life of , which is in the decay chain of 238U (the uranium or radium series).

Radium now has 34 known isotopes from 201Ra to 234Ra.

In the early history of the study of radioactivity, the different natural isotopes of radium were given different names (as were those of other radioactive elements), as it was not until Frederick Soddy's scientific work in the 1900s and 1910s that the concept of isotopes was employed. In this scheme, Ra was named actinium X (AcX), Ra thorium X (ThX), Ra radium (Ra), and Ra mesothorium 1 (MsTh).{{cite report |name-list-style=amp

In 2013 it was discovered that the nucleus of radium-224 is pear-shaped. This was the first discovery of an asymmetrical nucleus.

List of isotopes

Radium-235

|-id=Radium-201 | 201Ra | | 201.012815(22) | 20(30) ms | α | 197Rn | (3/2−) | |-id=Radium-201m | | 6(5) ms | α | 197Rn | 13/2+ | |-id=Radium-202 | 202Ra | | 202.009742(16) | 4.1(11) ms | α | 198Rn | 0+ | |-id=Radium-203 | 203Ra | | 203.009234(10) | 36(13) ms | α | 199Rn | 3/2− | |-id=Radium-203m | | 25(5) ms | α | 199Rn | 13/2+ | |-id=Radium-204 | 204Ra | | 204.0065069(96) | 60(9) ms | α | 200Rn | 0+ | |-id=Radium-205 | 205Ra | | 205.006231(24) | 220(50) ms | α | 201Rn | 3/2− | |-id=Radium-205m | | 180(50) ms | α | 201Rn | 13/2+ | |-id=Radium-206 | 206Ra | | 206.003828(19) | 0.24(2) s | α | 202Rn | 0+ | |-id=Radium-207 | α (86%)

203Rn
β+ (14%)
207Fr
-id=Radium-207m
IT (85%#)
207Ra
-
α (?%)
203mRn
-
β+ ?
207Fr
-id=Radium-208
α (87%)
204Rn
-
β+ (13%)
208Fr
-id=Radium-208m

| | 263(17) ns | IT | 208Ra | (8+) | |-id=Radium-209 | 209Ra | | 209.0019949(62) | 4.71(8) s | α (90%) | 205Rn | 5/2− | |-id=Radium-209m | α (90%)

205Rn
β+ (10%)
209Fr
-id=Radium-210
210Ra

| | 210.0004754(99) | 4.0(1) s | α | 206Rn | 0+ | |-id=Radium-210m | | 2.29(3) μs | IT | 210Ra | 8+ | |-id=Radium-211 | 211Ra | | 211.0008930(53) | 12.6(12) s | α | 207Rn | 5/2− | |-id=Radium-211m | | 9.5(3) μs | IT | 211Ra | 13/2+ | |-id=Radium-212 | α

208Rn
β+ ?
212Fr
-id=Radium-212m1

| | 9.3(9) μs | IT | 212Ra | 8+ | |-id=Radium-212m2 | | 0.85(13) μs | IT | 212Ra | 11− | |-id=Radium-213 | α (87%)

209Rn
β+ (13%)
213Fr
-id=Radium-213m
IT (99.4%)
213Ra
-
α (0.6%)
209Rn
-id=Radium-214
α (99.941%)
210Rn
-
β+ (0.059%)
214Fr
-id=Radium-214m1

| | 118(7) ns | IT | 214Ra | 6+ | |-id=Radium-214m2 | IT (99.91%)

214Ra
α (0.09%)
210Rn
-id=Radium-214m3

| | 295(7) ns | IT | 214Ra | 11− | |-id=Radium-214m4 | | 279(4) ns | IT | 214Ra | 14+ | |-id=Radium-214m5 | | 225(4) ns | IT | 214Ra | 17− | |-id=Radium-214m6 | | 128(4) ns | IT | 214Ra | (25−) | |-id=Radium-215 | 215Ra | | 215.0027182(77) | 1.669(9) ms | α | 211Rn | 9/2+# | |-id=Radium-215m1 | | 7.31(13) μs | IT | 215Ra | (25/2+) | |-id=Radium-215m2 | | 1.39(7) μs | IT | 215Ra | (29/2−) | |-id=Radium-215m3 | | 555(10) ns | IT | 215Ra | (43/2−) | |-id=Radium-216 | α

212Rn
EC (−8%)
216Fr
-id=Radium-217
217Ra

| | 217.0063227(76) | 1.95(12) μs | α | 213Rn | (9/2+) | |-id=Radium-218 |218Ra | | 218.007134(11) | 25.91(14) μs | α | 214Rn | 0+ | |-id=Radium-219 | 219Ra | | 219.0100847(73) | 9(2) ms | α | 215Rn | (7/2)+ | |-id=Radium-219m | | 10(3) ms | α | 215Rn | (11/2)+ | |-id=Radium-220 | 220Ra | | 220.0110275(82) | 18.1(12) ms | α | 216Rn | 0+ | |-id=Radium-221 | α

217Rn
CD (1.2×10−10%)Lightest known nuclide to undergo cluster decay
207Pb
14C
-id=Radium-222
α
218Rn
-
CD (3.0×10−8%)
208Pb
14C
-
α
219Rn
-
CD (8.9×10−8%)
209Pb
14C
-id=Radium-224
α
220Rn
-
CD (4.0×10−9%)
210Pb
14C
-id=Radium-225
β−
225Ac
-
α (0.0026%)
221Rn
-
α
222Rn
-
CD (2.6×10−9%)
212Pb
14C
-id=Radium-227
227Ra

| | 227.0291762(21) | 42.2(5) min | β− | 227Ac | 3/2+ | |-id=Radium-228 | 228Ra | Mesothorium 1 | 228.0310686(21) | 5.75(3) y | β− | 228Ac | 0+ | Trace |-id=Radium-229 | 229Ra | | 229.034957(17) | 4.0(2) min | β− | 229Ac | 5/2+ | |-id=Radium-230 | 230Ra | | 230.037055(11) | 93(2) min | β− | 230Ac | 0+ | |-id=Radium-231 | 231Ra | | 231.041027(12) | 104(1) s | β− | 231Ac | (5/2+) | |-id=Radium-231m | | ~53 μs | IT | 231Ra | (1/2+) | |-id=Radium-232 | 232Ra | | 232.0434753(98) | 4.0(3) min | β− | 232Ac | 0+ | |-id=Radium-233 | 233Ra | | 233.0475946(92) | 30(5) s | β− | 233Ac | 1/2+# | |-id=Radium-234 | 234Ra | | 234.0503821(90) | 30(10) s | β− | 234Ac | 0+ |

Actinides vs fission products

References

Isotope masses from:

    • Half-life, spin, and isomer data selected from the following sources.

    Notes

    References

    1. Nagel, Miriam C.. (September 1982). "Frederick Soddy: From alchemy to isotopes". Journal of Chemical Education.
    2. Giunta, Carmen J.. (2017). "ISOTOPES: IDENTIFYING THE BREAKTHROUGH PUBLICATION (1)". Bull. Hist. Chem..
    3. Looney, William B.. (1958). "Effects of Radium in Man". Science.
    4. Mitchell, S. A.. (1913). "Is Radium in the Sun?". Popular Astronomy.
    5. Hills, Stephanie. (8 May 2013). "First observations of short-lived pear-shaped atomic nuclei".
    Info: Wikipedia Source

    This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

    isotopes-of-radium radium lists-of-isotopes-by-element
    Want to explore this topic further?

    Ask Mako anything about Isotopes of radium — get instant answers, deeper analysis, and related topics.

    Research with Mako

    Free with your Surf account

    Content sourced from Wikipedia, available under CC BY-SA 4.0.

    This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

    Report