Nobelium-261

Properties and data of the isotope ²⁶¹No.

Contents

General data

Name of the isotope:Nobelium-261; No-261Symbol:²⁶¹No or 261102NoMass number A:261 (= number of nucleons)Atomic number Z:102 (= number of protons)Neutrons N:159Mass defect:263.175874908 u (per nucleus)Nuclear binding energy:245146.74842155 MeV (per nucleus)
939.2595725 MeV (average binding energy per nucleon)Half-life:- unknown -Spin and parity:
(nuclear angular momentum)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 159) and isobaric (same nucleon number A = 261) with Nobelium-261. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 159	Isobar A = 261
100	²⁵⁹Fm
101	²⁶⁰Md
102	²⁶¹No	²⁶¹No
103	²⁶²Lr	²⁶¹Lr
104	²⁶³Rf	²⁶¹Rf
105	²⁶⁴Db	²⁶¹Db
106	²⁶⁵Sg	²⁶¹Sg
107	²⁶⁶Bh	²⁶¹Bh
108	²⁶⁷Hs
109	²⁶⁸Mt
110	²⁶⁹Ds