## More Chemistry

Isotope Nuclide | E | N | Atomic Mass [Nuclear Mass] {Mass Excess} | Spin I(h/2π) | Parent |
---|---|---|---|---|---|

1 | 2 | 3 | 4 | 5 | 6 |

Flerovium-284 | 284114Fl | 170 | 284.18119(70) u [284.1186629 u] {93318.1774 MeV} | 0+ | |

Flerovium-285 | 285114Fl | 171 | 285.18350(43) u [285.1209729 u] {170.92915 MeV} | (3/2+) | |

Flerovium-286 | 286114Fl | 172 | 286.18423(59) u [286.1217029 u] {171.60914 MeV} | 0+ | |

Flerovium-287 | 287114Fl | 173 | 287.18672(66) u [287.1241929 u] {173.92856 MeV} | ||

Flerovium-287m | 287m114Fl | 173 | |||

Flerovium-288 | 288114Fl | 174 | 288.18778(82) u [288.1252529 u] {174.91594 MeV} | 0+ | |

Flerovium-289 | 289114Fl | 175 | 289.19052(55) u [289.1279929 u] {177.46824 MeV} | 5/2+ | |

Flerovium-289m | 289m114Fl | 175 | |||

Flerovium-290 | 290114Fl | 176 | 290.19188(75) u [290.1293529 u] {178.73507 MeV} | 0+ |

Isotope | Radioactive Decay | Extern | |||
---|---|---|---|---|---|

Half-life | Decay Mode | Probability | Energy | ||

7 | 8 | 9 | 10 | 11 | 12 |

Fl-284 | 2.5 ms | SF ^{}divα → ^{280}Cn | ≥ 75 % ≤ 25 % | 10.7(3) MeV | AL |

Fl-285 | 0.101 s | α → ^{281}CnSF ^{}div | ≥ 87.5 % ≤ 12.5 % | 10.560(71) MeV | AL |

Fl-286 | 0.166 s | SF ^{}divα → ^{282}Cn | 40 % 60 % | 10.335(41) MeV | AL |

Fl-287 | 0.40 s | α → ^{283}CnSF ^{}div | > 95 % < 5 % | 10.167(52) MeV | AL |

Fl-287m | |||||

Fl-288 | 0.64 s | α → ^{284}CnSF ^{}div | ≥ 97 % ≤ 3 % | 10.076(12) MeV | AL |

Fl-289 | 2.4 s | α → ^{285}CnSF ^{}div | > 94 % < 6 & | 9.954(65) MeV | AL |

Fl-289m | |||||

Fl-290 | 19 s | EC → ^{290}NhSF ^{}divα → ^{286}Cn | 0.416(843) MeV 9.856(30) MeV |

Notes (related to the columns):

1 - name of the nuclide, isotope.

2 - E: isotope symbol with mass number (superscript; number of nucleons) and Atomic number (subscript; number of protons).

3 - *N*: number of neutrons.

4 - relative atomic mass of the Flerovium isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to ^{12}C = 12.00000 [2]. In addition, the mass excess is given in MeV.

5 - nuclear spin *I*, unit: h/2π.

6 - source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.

7 - isotope notation in short form.

8 - decay: half-live of the Flerovium isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).

9 - decay mode: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β^{-} = beta minus decay with electron emission; EC = electron capture; β^{+} = positron emission; ε = β^{+} and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.

10 - decay probability in percent (%).

11 - decay energy; Particle energy related to decay type.

12 - other information and notes: AL = Adopted Levels (link to external data [1]).

Miscellaneous:

()- Numbers in brackets: uncertainty to represent the spread of the reported value.

~ - Theoretical values or systematic trends.

- unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.

**Properties of the Flerovium nucleides**

[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.

[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.

[3] - Live Chart of Nuclides. Nuclear structure and decay data.

**Flerovium: NMR properties **

[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.

[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.

[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.

[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).

**More sources:**

[8] - **Isotopic abundances, atomic weights and isotopic masses:** see respective keyword.

**Last update: **2022-11-28

**Perma link**: https://www.chemlin.org/chemical-elements/flerovium-isotopes.php

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