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 zero, 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 Number	102
Atomic Weight	259
Mass Number	248

Group
Period	7
Block	f

Protons	102 p⁺
Neutrons	146 n⁰
Electrons	102 e^-

Properties

Physical Properties
Atomic Radius
Molar Volume
Covalent Radius	176 pm
Metallic Radius
Ionic Radius	110 pm 108.5 pm
Crystal Radius	124 pm 122.5 pm
Van der Waals Radius	246 pm 324.8 pm
Density	9.9 g/cm³
Energy
Proton Affinity
Electron Affinity
Ionization Energy	6.65 eV/particle 12.5 eV/particle 25.8 eV/particle 41.5 eV/particle 60 eV/particle 74 eV/particle 97 eV/particle 119 eV/particle 140 eV/particle 170 eV/particle 187 eV/particle 216 eV/particle 246 eV/particle 267 eV/particle 290 eV/particle 312 eV/particle 341 eV/particle 367 eV/particle 394 eV/particle 420 eV/particle 448 eV/particle 475 eV/particle 496 eV/particle 520 eV/particle 701 eV/particle 734 eV/particle 768 eV/particle 805 eV/particle 840 eV/particle 875 eV/particle 934 eV/particle 969 eV/particle 1,010 eV/particle 1,045 eV/particle 1,220 eV/particle 1,260 eV/particle 1,300 eV/particle 1,340 eV/particle 1,500 eV/particle 1,550 eV/particle 1,680 eV/particle 1,730 eV/particle 1,920 eV/particle 2,010 eV/particle 2,100 eV/particle 2,200 eV/particle 2,290 eV/particle 2,380 eV/particle 2,470 eV/particle 2,570 eV/particle 2,680 eV/particle 2,760 eV/particle 2,860 eV/particle 2,950 eV/particle 3,050 eV/particle 3,140 eV/particle 3,627 eV/particle 3,705 eV/particle 3,790 eV/particle 3,878 eV/particle 3,962 eV/particle 4,045 eV/particle 4,234 eV/particle 4,320 eV/particle 4,413 eV/particle 4,500 eV/particle 4,850 eV/particle 4,930 eV/particle 5,030 eV/particle 5,110 eV/particle 5,750 eV/particle 5,850 eV/particle 6,110 eV/particle 6,210 eV/particle 9,680 eV/particle 9,860 eV/particle 10,060 eV/particle 10,270 eV/particle 10,470 eV/particle 10,660 eV/particle 11,200 eV/particle 11,410 eV/particle 11,630 eV/particle 11,840 eV/particle 12,420 eV/particle 12,600 eV/particle 12,800 eV/particle 12,980 eV/particle 15,000 eV/particle 15,200 eV/particle 15,600 eV/particle 15,800 eV/particle 31,700 eV/particle 32,200 eV/particle 32,700 eV/particle 33,200 eV/particle 40,500 eV/particle 41,200 eV/particle 42,100 eV/particle 42,632 eV/particle 168,806 eV/particle

Heat of Vaporization
Heat of Fusion
Heat of Formation
Electrons
Electron Shells	2, 8, 18, 32, 32, 8, 2

Valence Electrons	2

Electron Configuration	[Rn] 5f¹⁴ 7s²

Oxidation States	2, 3
Electronegativity	0.246
Electrophilicity
Phases
Phase	Solid
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 #ffffff #bd0d87 #bd0d87
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 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.
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	46
Mendeleev Number	40
Pettifor Number	35
Geochemical Class
Goldschmidt Class	synthetic
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 Numbers	1S0
Space Group	()

Isotopes of Nobelium

Stable Isotopes	0
Unstable Isotopes	17
Radioactive Isotopes	16

²⁴⁸No

Abundance
Relative Atomic Mass	248.086623 ± 0.000241 Da
Mass Number	248
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2003
Parity	+

²⁴⁸No Decay Modes

Decay Mode	Intensity
SF (spontaneous fission)	%

²⁴⁹No

Abundance	Radioactive ☢️
Relative Atomic Mass	249.087802 ± 0.0003 Da
Mass Number	249
G-Factor
Half Life	57 ± 12 us
Spin	5/2
Quadrupole Moment
Discovery Year	2003
Parity	+

²⁴⁹No Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%
α (α emission)	%

²⁵⁰No

Abundance	Radioactive ☢️
Relative Atomic Mass	250.087565 ± 0.000215 Da
Mass Number	250
G-Factor	0
Half Life	5.08 ± 0.27 us
Spin	0
Quadrupole Moment	0
Discovery Year	2003
Parity	+

²⁵⁰No Decay Modes

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

²⁵¹No

Abundance	Radioactive ☢️
Relative Atomic Mass	251.088942 ± 0.000194 Da
Mass Number	251
G-Factor
Half Life	800 ± 10 ms
Spin	7/2
Quadrupole Moment
Discovery Year	1967
Parity	+

²⁵¹No Decay Modes

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

²⁵²No

Abundance	Radioactive ☢️
Relative Atomic Mass	252.08896607 ± 0.000009975 Da
Mass Number	252
G-Factor	0
Half Life	2.467 ± 0.016 s
Spin	0
Quadrupole Moment	0
Discovery Year	1967
Parity	+

²⁵²No Decay Modes

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

²⁵³No

Abundance	Radioactive ☢️
Relative Atomic Mass	253.09056278 ± 0.00000742 Da
Mass Number	253
G-Factor	-0.11777777777778 ± 0.017777777777778
Half Life	1.57 ± 0.02 m
Spin	9/2
Quadrupole Moment	5.9 ± 1.7
Discovery Year	1967
Parity	-

²⁵³No Decay Modes

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

²⁵⁴No

Abundance	Radioactive ☢️
Relative Atomic Mass	254.090954211 ± 0.000010367 Da
Mass Number	254
G-Factor	0
Half Life	51.2 ± 0.4 s
Spin	0
Quadrupole Moment	0
Discovery Year	1966
Parity	+

²⁵⁴No Decay Modes

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

²⁵⁵No

Abundance	Radioactive ☢️
Relative Atomic Mass	255.093196439 ± 0.000015079 Da
Mass Number	255
G-Factor
Half Life	3.52 ± 0.18 m
Spin	1/2
Quadrupole Moment	0
Discovery Year	1967
Parity	+

²⁵⁵No Decay Modes

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

²⁵⁶No

Abundance	Radioactive ☢️
Relative Atomic Mass	256.094281912 ± 0.000008103 Da
Mass Number	256
G-Factor	0
Half Life	2.91 ± 0.05 s
Spin	0
Quadrupole Moment	0
Discovery Year	1963
Parity	+

²⁵⁶No Decay Modes

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

²⁵⁷No

Abundance	Radioactive ☢️
Relative Atomic Mass	257.096884203 ± 0.000006652 Da
Mass Number	257
G-Factor
Half Life	24.5 ± 0.5 s
Spin	3/2
Quadrupole Moment
Discovery Year	1967
Parity	+

²⁵⁷No Decay Modes

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

²⁵⁸No

Abundance	Radioactive ☢️
Relative Atomic Mass	258.098205 ± 0.000107 Da
Mass Number	258
G-Factor	0
Half Life	1.23 ± 0.12 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1989
Parity	+

²⁵⁸No Decay Modes

Decay Mode	Intensity
SF (spontaneous fission)	100%
α (α emission)	%

²⁵⁹No

Abundance	Radioactive ☢️
Relative Atomic Mass	259.100998364 ± 0.000006829 Da
Mass Number	259
G-Factor
Half Life	58 ± 5 m
Spin	9/2
Quadrupole Moment
Discovery Year	1973
Parity	+

²⁵⁹No Decay Modes

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

²⁶⁰No

Abundance	Radioactive ☢️
Relative Atomic Mass	260.102641 ± 0.000215 Da
Mass Number	260
G-Factor	0
Half Life	106 ± 8 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1985
Parity	+

²⁶⁰No Decay Modes

Decay Mode	Intensity
SF (spontaneous fission)	100%

²⁶¹No

Abundance	Radioactive ☢️
Relative Atomic Mass	261.105696 ± 0.000215 Da
Mass Number	261
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

²⁶¹No Decay Modes

Decay Mode	Intensity
α (α emission)	%

²⁶²No

Abundance	Radioactive ☢️
Relative Atomic Mass	262.107463 ± 0.000387 Da
Mass Number	262
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1988
Parity	+

²⁶²No Decay Modes

Decay Mode	Intensity
SF (spontaneous fission)	100%
α (α emission)	%

²⁶³No

Abundance	Radioactive ☢️
Relative Atomic Mass	263.110714 ± 0.000526 Da
Mass Number	263
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

²⁶³No Decay Modes

Decay Mode	Intensity
α (α emission)	%
SF (spontaneous fission)	%

²⁶⁴No

Abundance	Radioactive ☢️
Relative Atomic Mass	264.112734 ± 0.000634 Da
Mass Number	264
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁶⁴No Decay Modes

Decay Mode	Intensity
α (α emission)	%
SF (spontaneous fission)	%

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

Discoverers	Nobel Institute for Physics
Discovery Location	Sweden
Discovery Year	1957
Etymology (Name Origin)	Named in honor of Alfred Nobel, who invented dynamite and founded Nobel prize.
Pronunciation	no-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
Abundance in Oceans
Abundance in Human Body	0 %
Abundance in Meteor	0 %
Abundance in Sun	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Nobelium on ChemicalAid

Australian Educational Vocabulary ID	scot/3551
CAS Registry Number	10028-14-5
ChEBI ID	33396
ChemSpider ID	23207
DSSTOX compound identifier	DTXCID8065585
DSSTox substance ID	DTXSID70143094
Den Store Danske ID	nobelium
Elhuyar ZTH ID	028703
Encyclopædia Britannica Online ID	science/nobelium
Freebase ID	/m/025s4s4
French Vikidia ID	Nobélium
GND ID	4171959-1
Gran Enciclopèdia Catalana ID	0126480
Great Russian Encyclopedia Online ID	2665396
InChI	InChI=1S/No
InChIKey	ORQBXQOJMQIAOY-UHFFFAOYSA-N
KBpedia ID	Nobelium
MeSH descriptor ID	D009614
OmegaWiki Defined Meaning	339858
PubChem CID	24822
Römpp online ID	RD-14-01565
Store norske leksikon ID	nobelium
Treccani ID	nobelio
UNII	2ZRJ207R3E
USGS Thesaurus ID	1524
WordNet 3.1 Synset ID	14671900-n

Nobelium (No)

Properties

Isotopes of Nobelium

248No

248No Decay Modes

249No

249No Decay Modes

250No

250No Decay Modes

251No

251No Decay Modes

252No

252No Decay Modes

253No

253No Decay Modes

254No

254No Decay Modes

255No

255No Decay Modes

256No

256No Decay Modes

257No

257No Decay Modes

258No

258No Decay Modes

259No

259No Decay Modes

260No

260No Decay Modes

261No

261No Decay Modes

262No

262No Decay Modes

263No

263No Decay Modes

264No

264No Decay Modes