Unbiunium

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properties
Properties (if known)
Name , symbol , atomic number Unbiunium, Ubu, 121
Element category Superactinoids
Group , period , block 3 , 8 , g
CAS number 54500-70-8
Atomic
Atomic mass estimated 299 u
Electron configuration [ Og ] 5 g 1 8 s 2 (?)
Electrons per energy level 2, 8, 18, 32, 33, 18, 8, 2
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Values ​​that are particularly questionable are marked with (?)

Unbiunium is a currently hypothetical chemical element with atomic number 121.

In the periodic table it is between the 120 unbinilium and the 122 unbibium .

In the extended periodic table (it is outside the "normal" periodic table ) it belongs to the superactinoids . The name is the temporary systematic IUPAC name and stands for the three digits of the ordinal number.

It may be the first element of the periodic table to have an occupied g orbital , which would fill the 5th shell with an additional electron . Since there are no natural isotopes , it would first have to be generated artificially through a nuclear reaction .

Target-projectile combinations for cores with Z = 121

The following table shows all combinations for targets and projectiles that could be used to generate nuclei with a charge number of 121, whose half-life does not already stand in the way (T 1/2 > 0.2 a).

All combinations are deficient by at least 3 neutrons.

Target projectile product
core HWZ (a) core HWZ (a) core core comment
208 Pb stable 89 Y stable 297 Ubu 297 Ubu too neutron poor °)
232 Th 14 billion 71 Ga stable 303 Ubu 300 Ubu too neutron poor °)
238 U 4.5 billion 65 Cu stable 303 Ubu 300 Ubu too neutron poor °)
237 Np 2.1 million 64 Ni stable 301 Ubu 298 Ubu too neutron poor °)
244 Pu 80 million 59 Co stable 303 Ubu 300 Ubu too neutron poor °)
244 Pu 80 million 60 Co 5.2 304 Ubu 301 Ubu too low in neutrons °)
combination richest in neutrons
243 On 7370 58 feet stable 301 Ubu 298 Ubu too neutron poor °)
243 On 7370 60 feet 2.6 million 303 Ubu 300 Ubu too neutron poor °)
248 cm 340000 55 mn stable 303 Ubu 300 Ubu too neutron poor °)
250 cm 9000 55 mn stable 305 Ubu 302 Ubu too neutron poor °)
247 Bk 1380 54 Cr stable 301 Ubu 298 Ubu too neutron poor °)
248 Bk 9 54 Cr stable 302 Ubu 299 Ubu too neutron poor °)
249 Bk 0.88 54 Cr stable 303 Ubu 300 Ubu too neutron poor °)
249 Cf 351 51 V stable 300 Ubu 297 Ubu too neutron poor °)
250 cf 13 51 V stable 301 Ubu 298 Ubu too neutron poor °)
251 Cf 900 51 V stable 302 Ubu 299 Ubu too neutron poor °)
252 Cf 2.6 51 V stable 303 Ubu 300 Ubu too neutron poor °)
252 it 1.3 50 Ti stable 302 Ubu 299 Ubu too neutron poor °)
254 it 0.75 50 Ti stable 304 Ubu 301 Ubu too low in neutrons °)
combination richest in neutrons

°) If one follows the trend of the last generated isotopes of 115 Moscovium and 117 Tenness, these nuclei contain far too few neutrons to have longer half-lives.

Web links

Wiktionary: Unbiunium  - explanations of meanings, word origins, synonyms, translations