Plantilya:Infobox nobelium

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Nobelium
102No
Yb

No

(Upq)
mendeleviumnobeliumlawrencium
Appearance
unknown
General properties
Name, simbolo, kaiphan nobelium, No, 102
Pronunciation Plantilya:IPAc-en Plantilya:Respell
or Plantilya:IPAc-en Plantilya:Respell
Element category aktinido
Group, period, block [[group {{{group}}} element|{{{group}}}]], 7, f
Standard atomic weight [259]
Electron configuration [Rn] 5f14 7s2
2, 8, 18, 32, 32, 8, 2
Electron shells of nobelium (2, 8, 18, 32, 32, 8, 2)
History
Discovery Joint Institute for Nuclear Research (1966)
Physical properties
Phase magahi (predicted)[1]
Melting point 1100 K, 827 °C, 1521 (predicted)[1] °F
Atomic properties
Oxidation states 2, 3
Electronegativity 1.3 (predicted)[2] (Pauling scale)
Ionization energies 1st: 641.6 kJ·mol−1
2nd: 1254.3 kJ·mol−1
3rd: 2605.1 kJ·mol−1
Miscellanea
CAS registry number 10028-14-5
Most stable isotopes
Main article: Isotopes of nobelium
iso NA half-life DM DE (MeV) DP
253No syn 1.62 min 80% α 8.14, 8.06, 8.04, 8.01 249Fm
20% β+ 253Md
254No syn 51 s 90% α 250Fm
10% β+ 254Md
255No syn 3.1 min 61% α 8.12, 8.08, 7.93 251Fm
39% β+ 2.012 255Md
257No syn 25 s 99% α 8.32, 8.22 253Fm
1% β+ 257Md
259No syn 58 min 75% α 7.69, 7.61, 7.53.... 255Fm
25% ε 259Md
10% SF
only isotopes with half-lives over 5 seconds are included here
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