Nobelium

Nobelium (No)

Nobelium is the 102nd element in the periodic table and has a symbol of No and atomic number of 102. It has an atomic weight of (259) and a mass number of 248. Nobelium has one hundred two protons and one hundred forty-six neutrons in its nucleus, and one hundred two electrons in seven shells. It is located in group Actinides, period seven and block f of the periodic table. Radioactive metallic transuranic element, belongs to the actinoids. Seven known isotopes exist, the most stable being No-254 with a half-life of 255 seconds. First identified with certainty by Albert Ghiorso and Glenn T. Seaborg in 1966. Unnilbium has been proposed as an alternative name.
Atomic Number102
Atomic Weight259
Mass Number248
Group
Period7
Blockf
Protons102 p+
Neutrons146 n0
Electrons102 e-
Animated Bohr Model of No (Nobelium)

Physical Properties

Atomic Radius
Molar Volume
Covalent Radius
176 pm
Metallic Radius
Ionic Radius
110 pm
Crystal Radius
124 pm
Van der Waals Radius
246 pm
Density
9.9 g/cm³

Chemical Properties

Energy
Proton Affinity
Electron Affinity
Ionization Energy
Ionization Energies of No (Nobelium)
Heat of Vaporization
Heat of Fusion
Heat of Formation
Electrons
Electron Shells2, 8, 18, 32, 32, 8, 2
Bohr Model: No (Nobelium)
Valence Electrons2
Lewis Structure: No (Nobelium)
Electron Configuration[Rn] 5f14 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f14 7s2
Enhanced Bohr Model of No (Nobelium)
Orbital Diagram of No (Nobelium)
Oxidation States2, 3
Electronegativity
Electrophilicity Index
States of Matter
PhaseSolid
Gas Phase
Boiling Point
Melting Point
1,100.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual

Nobelium is a Colorless. No has a CPK of #ffffff, Jmol of #bd0d87, and MOLCAS GV of #bd0d87.

Color
Colorless
Appearance
Refractive Index
Thermodynamic Properties
Thermal Conductivity
Thermal Expansion
Molar Heat Capacity
Specific Heat Capacity
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type
Electrical Conductivity
Electrical Resistivity
Superconducting Point
Magnetism
Type
Magnetic Susceptibility (Mass)
Magnetic Susceptibility (Molar)
Magnetic Susceptibility (Volume)
Magnetic Ordering
Curie Point
Neel Point
Structure

The lattice angles of Nobelium is .

Crystal Structure ()
Lattice Constant
Lattice Angles
Mechanical Properties
Hardness
Bulk Modulus
Shear Modulus
Young's Modulus
Poisson Ratio
Speed of Sound
Classification

The Glawe Number of Nobelium is 46. The Mendeleev Number of No is 40. The Pettifor Number of Element 102 is 35. The Goldschmidt Class of Nobelium (No) is synthetic.

CategoryActinides, Actinides
CAS Group
IUPAC Group
Glawe Number46
Mendeleev Number40
Pettifor Number35
Geochemical Class
Goldschmidt Classsynthetic

Other

The Dipole Polarizability of Nobelium is 110 plus or minus 6 a₀. The Allotropes of No is . The Quantum Numbers of Element 102 is 1S0. The Space Group of Nobelium (No) is ().

Gas Basicity
Dipole Polarizability
110 ± 6 a₀
C6 Dispersion Coefficient
Allotropes
Neutron Cross Section
Neutron Mass Absorption
Quantum Numbers1S0
Space Group ()

Isotopes of Nobelium

Stable Isotopes0
Unstable Isotopes17
Natural Isotopes0

248No

Mass Number248
Neutron Number146
Relative Atomic Mass
248.086623 ± 0.000241 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin0
Quadrupole Moment
0
Discovery Year2003
Parity+

Decay ModeIntensity
SF (spontaneous fission)

249No

Mass Number249
Neutron Number147
Relative Atomic Mass
249.087802 ± 0.0003 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
57 ± 12 us
Spin5/2
Quadrupole Moment
Discovery Year2003
Parity+

Decay ModeIntensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

250No

Mass Number250
Neutron Number148
Relative Atomic Mass
250.087565 ± 0.000215 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
5.08 ± 0.27 us
Spin0
Quadrupole Moment
0
Discovery Year2003
Parity+

Decay ModeIntensity
SF (spontaneous fission)100%
α (α emission)
β+ (β+ decay; β+ = ϵ + e+)

251No

Mass Number251
Neutron Number149
Relative Atomic Mass
251.088942 ± 0.000194 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
800 ± 10 ms
Spin7/2
Quadrupole Moment
Discovery Year1967
Parity+

Decay ModeIntensity
α (α emission)83%
β+ (β+ decay; β+ = ϵ + e+)
SF (spontaneous fission)0.3%

252No

Mass Number252
Neutron Number150
Relative Atomic Mass
252.08896607 ± 0.000009975 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
2.467 ± 0.016 s
Spin0
Quadrupole Moment
0
Discovery Year1967
Parity+

Decay ModeIntensity
α (α emission)67.6%
SF (spontaneous fission)31.3%
β+ (β+ decay; β+ = ϵ + e+)1.1%

253No

Mass Number253
Neutron Number151
Relative Atomic Mass
253.09056278 ± 0.00000742 Da
G-Factor
-0.11777777777778 ± 0.017777777777778
Abundance
Radioactivity☢️ Radioactive
Half Life
1.57 ± 0.02 m
Spin9/2
Quadrupole Moment
5.9 ± 1.7
Discovery Year1967
Parity-

Decay ModeIntensity
α (α emission)55%
β+ (β+ decay; β+ = ϵ + e+)
SF (spontaneous fission)

254No

Mass Number254
Neutron Number152
Relative Atomic Mass
254.090954211 ± 0.000010367 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
51.2 ± 0.4 s
Spin0
Quadrupole Moment
0
Discovery Year1966
Parity+

Decay ModeIntensity
α (α emission)90%
β+ (β+ decay; β+ = ϵ + e+)10%
SF (spontaneous fission)0.17%

255No

Mass Number255
Neutron Number153
Relative Atomic Mass
255.093196439 ± 0.000015079 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
3.52 ± 0.18 m
Spin1/2
Quadrupole Moment
0
Discovery Year1967
Parity+

Decay ModeIntensity
β+ (β+ decay; β+ = ϵ + e+)70%
α (α emission)30%

256No

Mass Number256
Neutron Number154
Relative Atomic Mass
256.094281912 ± 0.000008103 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
2.91 ± 0.05 s
Spin0
Quadrupole Moment
0
Discovery Year1963
Parity+

Decay ModeIntensity
α (α emission)99.45%
SF (spontaneous fission)0.55%
ϵ (electron capture)

257No

Mass Number257
Neutron Number155
Relative Atomic Mass
257.096884203 ± 0.000006652 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
24.5 ± 0.5 s
Spin3/2
Quadrupole Moment
Discovery Year1967
Parity+

Decay ModeIntensity
α (α emission)85%
β+ (β+ decay; β+ = ϵ + e+)15%
SF (spontaneous fission)

258No

Mass Number258
Neutron Number156
Relative Atomic Mass
258.098205 ± 0.000107 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
1.23 ± 0.12 ms
Spin0
Quadrupole Moment
0
Discovery Year1989
Parity+

Decay ModeIntensity
SF (spontaneous fission)100%
α (α emission)

259No

Mass Number259
Neutron Number157
Relative Atomic Mass
259.100998364 ± 0.000006829 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
58 ± 5 m
Spin9/2
Quadrupole Moment
Discovery Year1973
Parity+

Decay ModeIntensity
α (α emission)75%
ϵ (electron capture)25%
SF (spontaneous fission)10%

260No

Mass Number260
Neutron Number158
Relative Atomic Mass
260.102641 ± 0.000215 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
106 ± 8 ms
Spin0
Quadrupole Moment
0
Discovery Year1985
Parity+

Decay ModeIntensity
SF (spontaneous fission)100%

261No

Mass Number261
Neutron Number159
Relative Atomic Mass
261.105696 ± 0.000215 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

Decay ModeIntensity
α (α emission)

262No

Mass Number262
Neutron Number160
Relative Atomic Mass
262.107463 ± 0.000387 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin0
Quadrupole Moment
0
Discovery Year1988
Parity+

Decay ModeIntensity
SF (spontaneous fission)100%
α (α emission)

263No

Mass Number263
Neutron Number161
Relative Atomic Mass
263.110714 ± 0.000526 Da
G-Factor
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

Decay ModeIntensity
α (α emission)
SF (spontaneous fission)

264No

Mass Number264
Neutron Number162
Relative Atomic Mass
264.112734 ± 0.000634 Da
G-Factor
0
Abundance
Radioactivity☢️ Radioactive
Half Life
Spin0
Quadrupole Moment
0
Discovery Year
Parity+

Decay ModeIntensity
α (α emission)
SF (spontaneous fission)
Electron shell 102 Nobelium

History

Nobelium was discovered by Albert Ghiorso, Glenn T. Seaborg, John R. Walton and Torbjørn Sikkeland in 1958 at the University of California, Berkeley. It was produced by the bombardment of curium with carbon atoms. It was correctly identified in 1966 by scientists at the Flerov Laboratory of Nuclear Reactions in Dubna, Soviet Union. Named after of Alfred Nobel, Swedish chemist who discovered dynamite and founder of the Nobel Prizes

DiscoverersNobel Institute for Physics
Discovery LocationSweden
Discovery Year1957
Etymology (Name Origin)Named in honor of Alfred Nobel, who invented dynamite and founded Nobel prize.
Pronunciationno-BELL-i-em (English)
Nobelium is harmful due to its radioactivity
Nobelium is a divalent ion in aqueous solution

Uses

Nobelium is used for scientific research purposes only. It has no significant commercial applications.

Sources

Made by bombarding curium with carbon-13

Abundance
Abundance in Earth's crust
Natural Abundance (Oceans)
Natural Abundance (Human Body)
0 %
Natural Abundance (Meteor)
0 %
Natural Abundance (Sun)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants

Also Known As

  • No
  • element 102
  • Unb
  • unnilbium
  • 102No

Translations

  • Frenchnobélium
  • GermanNobelium
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  • Amharicኖብሊየም
  • Arabicنوبليوم
  • AzerbaijaniNobelium
  • BelarusianНабелій
  • Banglaনোবেলিয়াম
  • Bosniannobelij
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  • Czechnobelium
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  • WelshNobeliwm
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  • Greekνομπέλιο
  • Esperantonobelio
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  • Dutchnobelium
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  • Chinese (China)
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  • Northern FrisianNobeelium
  • Literary Chinese
  • oloNobelii
  • Yiddishנאבעליום
  • TajikНобелий
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  • SardinianNobèliu
  • Moroccan Arabicنوبيليوم
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