Nihonium-284

Properties and data of the isotope ²⁸⁴Nh.

Contents

General data

Name of the isotope:Nihonium-284; Nh-284Symbol:²⁸⁴Nh or 284113NhMass number A:284 (= number of nucleons)Atomic number Z:113 (= number of protons)Neutrons N:171Isotopic mass:284.17884(57) u (atomic weight of Nihonium-284)Nuclide mass:284.1168613 u (calculated nuclear mass without electrons)Mass excess:166.58839 MeVMass defect:2.187089252 u (per nucleus)Nuclear binding energy:2037.2605157 MeV (per nucleus)
7.17345252 MeV (average binding energy per nucleon)Separation energy:S_N = 6.044(689) MeV (first neutron)
S_P = 2.035(814) MeV (first proton)Half-life:0.97 sDecay constant λ:0.71458472222675 s^-1Specific activity α:1.515256990707 × 10⁺²¹ Bq g^-1
40952891640.732 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2004

Radioactive Decay

Half-life T_½ = 0.97 s respectively 9.7 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	²⁸⁰Rg	100 %	10.280(38) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 171) and isobaric (same nucleon number A = 284) with Nihonium-284. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.