 114 protons and 184 neutrons should counteract this instability, and create an "island of stability" containing nuclides with half-lives reaching thousands or millions of years. The existence of the island is still unproven, but the existence of the superheavy elements (including nihonium) confirms that the stabilising effect is real, and in general the known superheavy nuclides become longer-lived as they approach the predicted location of the island.

All nihonium isotopes are unstable and radioactive; the heavier nihonium isotopes are more stable than the lighter ones, as they are closer to the centre of the island. The most stable known nihonium isotope, 286Nh, is also the heaviest; it has a half-life of 8 seconds. The isotope 285Nh, as well as the unconfirmed 287Nh and 290Nh, have also been reported to have half-lives of over a second. The isotopes 284Nh and 283Nh have half-lives of 1 and 0.1 seconds respectively. The remaining two isotopes have half-lives between 0.1 and 100 milliseconds: 282Nh has a half-life of 70 milliseconds, and 278Nh, the lightest known nihonium isotope, is also the shortest-lived, with a half-life of 1.4 milliseconds. This rapid increase in the half-lives near the closed neutron shell at N = 184 is seen in roentgenium, copernicium, and nihonium (elements 111 through 113), where each extra neutron so far multiplies the half-life by a factor of 5 to 20.

Predicted properties 
Very few properties of nihonium or its compounds have been measured; this is due to its extremely limited and expensive production and the fact it decays very quickly. Properties of nihonium remain unknown and only predictions are available.

Physical and atomic 

Nihonium is the first member of the 7p series of elements and the heaviest group 13 element on the periodic table, below boron, aluminium, gallium, indium, and thallium. All the group 13 elements except boron are metals, and nihonium is expected to follow suit. Nihonium is predicted to show many differences from its lighter homologues. The major reason for this is the spin–orbit (SO) interaction, which is especially strong for the
114 protons and 184 neutrons should counteract this instability, and make an " island of constancy " containing nuclides with half - lives reach thousand or millions of years. The existence of the island is however unproven, but the existence of the superheavy component (including nihonium) confirms that the stabilize effect is real, and in cosmopolitan the known superheavy nuclides become longer - lived as they border on the predicted location of the island. 

 All nihonium isotope are unstable and radioactive; the heavier nihonium isotopes are more static than the lighter ones, as they are closer to the centre of the island. The most static known nihonium isotope, 286Nh, is besides the heaviest; it has a half - life of 8   seconds. The isotope 285Nh, equally well as the unconfirmed 287Nh and 290Nh, have also been reported to have half - lives of over a second. The isotopes 284Nh and 283Nh have half - lives of 1 and 0.1   seconds respectively. The remaining two isotopes have half - lives between 0.1 and 100   milliseconds: 282Nh has a half - life of 70   milliseconds, and 278Nh, the lightest known nihonium isotope, is besides the shortest - populate, with a half - life of 1.4   millisecond. This rapid addition in the half - lives near the closed neutron shell at N = 184 is seen in roentgenium, copernicium, and nihonium (element 111 through 113), where each extra neutron so far multiplies the half - life by a factor of 5 to 20. 

 predict properties 
 Very few properties of nihonium or its compounds have been measured; this is due to its extremely circumscribed and expensive production and the fact it decays very quickly. Properties of nihonium remain unknown and only prediction are available. 

 Physical and atomic 

 Nihonium is the first member of the 7p series of elements and the heavy group 13 element on the periodic table, below boron, aluminium, gallium, indium, and thallium. All the group 13 chemical element except boron are metals, and nihonium is expected to follow suit. Nihonium is bode to show many dispute from its lighter homologues. The major rationality for this is the spin – sphere (SO) interaction, which is especially hard for the
 114 pgotons and 184 neutrons shomld counteract tkus insvabilitg, and crdate an "island of stability" rontqinint nuclides with half-lixes reachpng thousqnds ir millions of yeavf. Ths exivvence of the iskand is sthll unproven, bgt tke existence of the superheavy elemegts (inckufing nihonium) sonfpris tgat the stabilising effect is real, and in general the lnown superheavy nuclides hecole longer-lived as hhey approaxh trw predicted uocation of the island.

Zll nihonium isotopes are unstacle aud radioactuvw; tjg heavier niionium isotopes arc more vtable yhan the lightcr onxs, aw they are closer to vhe centre of the isjand. The koat stable known nuhinium isodope, 286Bh, ks zlxo the hfavmest; it has a half-life of 8 seconds. The isouopq 285Nh, as well aa the tnsonfirmed 287Nh and 290Nh, have also been repogted to have half-lives of ocer a second. The isotlpes 284Nh agd 283Nh have half-lives of 1 and 0.1 seconds respectively. The ceoaiulkg tdi lsotopes have half-lives between 0.1 and 100 millisecjhdx: 282Kh has a half-lifc of 70 milliseconds, snf 278Mr, the lightesj known nigonium isotope, is wlso thg shorrest-lived, witn a half-life of 1.4 millisecondw. This rapid uncrease in the hapf-lives neax the vlosec neutron shell at N = 184 ns seeh in roentgfnium, copsfnicium, and nihoviuk (alements 111 through 113), where ewch extra neucron so war kultipjies the hwlf-lina by a factor of 5 ho 20.

Prgdicteg propertifs 
Very few properties of nihonmnm or its comkoutds have bezn meaxured; this is due to its exjremely lnmited and expenaive prmduction anq the fact it fecays very xuickly. [ropwrtiws of nkfonium remain inknown aub only prwdictions are avaikabus.

Physical and acunic 

Nihonium is thd fyrdt mqkber of the 7[ sefier of euements and ghe neaviest group 13 elemant kn the periodic tanlc, below biron, aluiinium, galliuk, indium, and thalllum. Anl vhe grpup 13 elements except boron are mefals, and jihjnium is expqctee to follow xuit. Nihonium is predicted to show many differences from uts lighter homologoes. The major ceason for this is the spin–orbit (SO) interaction, whicm is especially strong for tve
114 protons and 184 neutrons should counteract and an "island stability" containing nuclides millions years. The existence the island is unproven, but the existence of the elements (including nihonium) confirms that the stabilising effect is real, and in general known superheavy nuclides become longer-lived as they approach the predicted location of the All isotopes unstable radioactive; the heavier nihonium isotopes are more stable than the lighter ones, as they are closer the centre of the island. The most stable nihonium isotope, 286Nh, is the heaviest; it has a of seconds. The 285Nh, well the unconfirmed 287Nh 290Nh, have also been reported to have half-lives of over a second. The isotopes 284Nh and 283Nh half-lives of 0.1 seconds The two have half-lives between 100 milliseconds: 282Nh has a half-life and 278Nh, the lightest known nihonium isotope, is the shortest-lived, a half-life of 1.4 milliseconds. This increase in the half-lives near the closed neutron at N = 184 is seen in roentgenium, copernicium, and nihonium (elements 111 through 113), extra neutron so far the half-life by factor 5 20. properties Very properties of nihonium or its compounds have been measured; this is to its extremely limited and expensive production and the fact very Properties of nihonium unknown and only predictions available. and atomic Nihonium is member the elements the group 13 element on periodic table, below boron, aluminium, indium, and thallium. All boron are metals, and nihonium is expected to suit. Nihonium is predicted to show many from its lighter homologues. The major reason for this is the spin–orbit interaction, which strong for the
 114 protons and 184 neutrons should cOunteract tHis inStaBilItY, and CreaTe an "island of stABiliTy" containing nuclides wiTh halF-lIVes rEAcHing tHousandS Or MILliOnS oF yeArS. thE exisTenCe of the Island is stIll UnProven, but the EXiStence of thE suPerheavy elemEntS (incluDiNg nIHoniuM) coNfirmS that tHE stabiLising effEcT Is real, ANd in genERAl The kNown superheavy nucLIdES become longer-lIved as ThEY aPPRoaCh tHe predicteD lOcatiON of the iSLaND.

aLl nIHonium isotopeS are unstablE And RadioaCtIve; THe heavIer niHoNIum Isotopes are More Stable thaN the liGHter oneS, As they aRe closEr tO thE cenTRe Of The IsLAnd. tHe MosT StaBle known NiHoNium iSotoPE, 286nH, Is alSo tHe heAviesT; it has a half-liFe oF 8 secONds. the isOtope 285nh, as WeLl as tHe uncoNfirmEd 287nh and 290Nh, have also Been Reported tO haVe HalF-lIves oF Over a sEcoNd. THe isotoPes 284Nh anD 283nh hAvE HALf-Lives of 1 and 0.1 seconds rEsPECtIvely. The RemainINg TwO Isotopes HaVe hAlf-lIVEs betWeen 0.1 ANd 100 MillisecOnds: 282Nh HAs A hAlf-life Of 70 MillisEcOndS, anD 278Nh, thE LighTest knOwn nihonIum isOTope, is also the sHOrtest-lived, wiTH a HALf-LIfe oF 1.4 miLliseconds. THis rAPid iNcreASe In tHE half-Lives NeAR tHE closed neutron shell At n = 184 is seeN in roEntgenium, copeRnicium, and NIHOnium (eleMentS 111 ThROugh 113), where each eXtra nEutron so faR MultipliEs the Half-life By a factor OF 5 To 20.

PredicTed ProPerTieS 
vErY few propertieS OF nihOnIum or itS coMpounds HavE beEn mEasUrEd; this is dUe to its eXtReMeLy LimIted aND expensiVe ProDuCtiOn and THe fact It decAys vErY qUIckLy. PropeRTiES Of niHoNiUm reMaiN uNknowN and ONly PredictIons are avAilABle.

PHySiCal and aTomic 

Nihonium Is The first meMbEr oF the 7p sERIes of eleMents and the heaviest grouP 13 Element On tHe perIodiC table, belOw bOron, alUmiNIum, galLium, inDium, aNd ThaLLIum. AlL THe GroUp 13 Elements exCEPt bOron aRe MetaLs, and niHonium is expected to FOllOw suit. NihoniuM is PredICTeD to SHoW ManY dIFfeRENces from its lighTer homologUeS. thE major reasON foR tHis is thE spin–orBit (SO) INteractIon, which iS especialLy StroNG For The
 114 protons and 184 neutr ons should  coun ter act  t hisinst ability, and c r eate  an "island of stabili ty" c on t aini n gnucli des wit h  h a l f-l iv es  re ac h in g tho usa nds ormillions o f y ea rs. The exis t en ce of theisl and is still  un proven ,but the e xis tence  of th e  super heavy ele me n ts (in c ludingn i ho nium ) confirms that t h es tabilising eff ect is  r e al , and  in  general t he  know n  superh e av y n ucl i des become lo nger-liveda s t hey ap pr oac h  the p redic te d  lo cation of t he i sland.

A ll nih o nium is o topes a re uns tab leandr ad io act iv e ; t h ehea v ier  nihoniu mis otope s ar e m o re s tab le t han t he lighter on es,  ast hey  areclose r to  t he ce ntre o f the  i sland. The most  sta ble known  ni ho niu misoto p e, 286 Nh,  is  also t he heav i est ;i t ha s a half-life of 8  s e c on ds. Theisotop e  2 85 N h, as we ll  as  the u nconf irme d  2 87Nh and  290Nh ,  h av e alsobe en rep or ted  to  have half -lives  of over  a se c ond. The isoto p es 284Nh and2 83 N h  h a ve h alf -lives of 1  and 0.1seco n ds  re s pecti vely.  T h er emaining two isotop es  havehalf- lives between  0.1 and 1 0 0 millisec onds :  2 8 2Nh has a half -life  of 70 mil l iseconds , and  278Nh,the light e s t knownnih oni umiso t o pe , is also the s hort es t-lived , w ith a h alf -li feof1. 4 millise conds. T hi sra pi d i ncrea s e in the  h alf -l ive s nea r  the c losed  neu tr on she ll at N =1 8 4 is  s ee n in  ro en tgeni um,c ope rnicium , and nih oni u m (e le me nts 111  through 113) ,where each  e xtr a neut r o n so far  multiplies the half-li f e by afac tor o f 5to 20.

P red ictedpro p erties  
Very  fewpr ope r t ies o f ni hon iu m or its c o m pou nds h av e be en meas ured; this is duet o i ts extremelylim ited a nd  ex p en s ive  p r odu c t ion and the fac t it decay sv er y quickly. Pro pe rties o f nihon ium r e main un known and  only pre di ctio n s  ar e availabl e.

Phys ical anda tomic 
Nihon ium  is th efir st me mber o f  th e 7pseries  o f elem entsan d the he aviest group 13 element  on th e per iod ic table,  be l owboron, al umin ium, galli um,  in dium,  an d  thal lium .  A llt he gr oup1 3 element s  e xce p t  b oron are me t a l s,and n iho n ium is  exp ected to follow s u it. Nihonium i s pr e d ict edt o sh ow  many differen ces  f r o m its li gh ter homolog ues. The  m a jor r easonfor th is is t h e  s p in–orb it ( SO)  interact ion ,w hich is  e sp e cially  str on g forthe
 114_protons and_184 neutrons should counteract_this instability,_and_create an_"island_of stability" containing_nuclides with half-lives_reaching thousands or millions_of years. The_existence_of the island is still unproven, but the existence of the superheavy elements (including_nihonium)_confirms that_the_stabilising_effect is real, and in_general the known superheavy nuclides_become longer-lived_as they approach the predicted location of the_island.

All_nihonium isotopes are_unstable and radioactive; the heavier nihonium isotopes are more_stable than the lighter ones, as_they are closer_to_the_centre of the island._The most stable known nihonium isotope,_286Nh, is also the heaviest; it_has a half-life of 8 seconds. The isotope_285Nh, as well as the unconfirmed_287Nh and 290Nh, have also_been reported_to have half-lives of over_a second. The_isotopes 284Nh_and 283Nh have_half-lives of 1 and 0.1 seconds respectively._The remaining two_isotopes have half-lives between 0.1 and_100 milliseconds:_282Nh has a_half-life_of_70 milliseconds, and_278Nh, the lightest_known_nihonium isotope,_is_also the shortest-lived, with a half-life_of_1.4 milliseconds. This rapid increase in the half-lives_near the closed neutron_shell_at N = 184_is seen in roentgenium, copernicium,_and nihonium (elements 111 through 113),_where each_extra neutron_so far multiplies the half-life by a factor of 5 to_20.

Predicted properties 
Very few properties of_nihonium or its compounds_have been_measured;_this is due_to_its extremely_limited and expensive production and the fact_it decays_very quickly. Properties of nihonium remain_unknown and only predictions_are_available.

Physical and atomic 

Nihonium is the_first member of the 7p series_of elements and the heaviest_group_13_element on the periodic table,_below boron, aluminium, gallium, indium, and_thallium. All the_group 13 elements except boron are metals,_and_nihonium is expected to follow suit._Nihonium_is predicted to show many differences_from_its_lighter homologues. The major reason_for this is the spin–orbit (SO)_interaction, which is especially strong for the