Nobelium is a radioactive metal with a total of twelve isotopes that are known to exist, with the most stable being 259No with a half-life of 58 minutes. The shorter-lived 255No with a half-life of 3.1 minutes is most commonly used in chemistry because it can be produced on a larger scale.

1958 by Nobel Institute for Physics and Berkeley, California, USA.

DISCOVERY

From the named of Alfred Nobel, inventor of dynamite and benefactor of science.

ETYMOLOGY

Nobelium

Element

No

Symbol

102

102 Atomic Number

Atomic Number

Actinide

Classification

10028-14-5

CAS Number

-

Elemental Colour

-

Refractive Index

-

Poisson Ratio

26.172 cm³

Molar Volume

-

Brinell Hardness

-

Mohs Hardness

-

Vickers Hardness

-

Speed of Sound

-

Bulk Modulus

-

Shear Modulus

-

Young Modulus

Allotropes

NONE

1,100.15 K, 827.00 °C

827.00 °C

Melting Point

-

Boiling Point

-

Automatic Ignition

-

Flashpoint

-

Critical Temperature

-

Critical Pressure

-

Thermal Conductivity

-

Thermal Expansion

-

Specific Heat

-

Heat Fusion

-

Heat Vaporisation

-

Heat Combustion

-

Curie Point

-

Neel Point

-

Adiabatic Index

Solid

Phase

-

Electrical Type

-

Conductivity

-

Resistivity

-

Superconducting Point

-

Magnetic Type

-

Mass Susceptibility

-

Molar Susceptibility

-

Volume Susceptibility

Material Composition

-

Universe

-

Meteorites

-

Sun

-

Earth Crust

-

Oceans

-

Humans

259.101'030'0

Atomic Weight

-

Atomic Radius

176 pm

Covalent Radius Single Bond

159 pm

Covalent Radius Double Bond

-

Covalent Radius Triple Bond

246 pm

Van der Waals Radius

[Rn]7s²5f¹⁴

Electron Configuration

Cubic, Face-centred

Crystal Structure

9.900'00 g/cm³

Density as Solid

-

Density as Liquid

-

Density as Gas

-

Space Group Name

-

Space Group Number

-

Lattice Angles

-

Lattice Constants

2.78 hours

Half Life

5.56 hours

Lifetime

5f¹⁴ = 5, 3, +3, -1/2

Quantum Numbers

-

Neutron Cross Section

-

Neutron Mass Absorption

Stable Isotopes

NONE

Unstable Isotopes

Isotopes Overview

Isotope	Stability	Symbol	Type	Protons		Neutrons		Spin	Parity	Mass		Abundance		Mass Measure	Mass Excess		Binding Energy		Dipole Moment	Quadrupole Moment	Halflife in Years		Halflife in Seconds		A01 Decay Probability		A01 Decay Mode	A01 Decay Energy		A01 Decay Daughter	A01 Decay Link	A02 Decay Mode	A02 Decay Energy		A02 Decay Daughter	A02 Decay Link	A03 Decay Probability		A03 Decay Mode	A03 Decay Energy		A03 Decay Daughter	A03 Decay Link	Y01 Decay Product Yield		Y01 Decay Product Nuclide	Y02 Decay Product Yield		Y02 Decay Product Nuclide	Y03 Decay Product Yield		Y03 Decay Product Nuclide	Y04 Decay Product Yield		Y04 Decay Product Nuclide	Y05 Decay Product Yield		Y05 Decay Product Nuclide	Y06 Decay Product Yield		Y06 Decay Product Nuclide	Y07 Decay Product Yield		Y07 Decay Product Nuclide	Y08 Decay Product Yield		Y08 Decay Product Nuclide	Y09 Decay Product Yield		Y09 Decay Product Nuclide	Y10 Decay Product Yield		Y10 Decay Product Nuclide	Y11 Decay Product Yield		Y11 Decay Product Nuclide	Y12 Decay Product Yield		Y12 Decay Product Nuclide
Isotope_102_no_248_u	Unstable	²⁴⁸No	Boson	102	p	146	n	0	1	248.086'596'000'0	u	~ 0	%	~ 0	101.407'000'000'0	MeV	7.383'000'000'0	MeV	-	-	6.34E-14	year	2.000	micro-seconds ( x⁻⁶ )																													?	%	²⁰⁶Pb	?	%	¹⁷⁶Hf	?	%	¹⁶⁰Dy	?	%	¹⁴⁰Ce	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_102_no_249_u	Unstable	²⁴⁹No	Fermion	102	p	147	n	5/2	1	249.087'833'000'0	u	~ 0	%	~ 0	80.664'000'000'0	MeV	7.424'000'000'0	MeV	-	-	1.81E-12	year	57.000	micro-seconds ( x⁻⁶ )	?	%	β+	3,468.000	keV	²⁴⁹Md	²⁴⁹No > [ ? % , β+ , 3,468.0 keV ] > ²⁴⁹Md	α	9,170.000	keV	²⁴⁵Fm	²⁴⁹No > [ , α , 9,170.0 keV ] > ²⁴⁵Fm								?	%	²⁰⁵Tl	?	%	²⁰⁷Pb
Isotope_102_no_250_u	Unstable	²⁵⁰No	Boson	102	p	148	n	0	1	250.087'510'000'0	u	~ 0	%	~ 0	81.816'000'000'0	MeV	7.422'000'000'0	MeV	-	-	1.81E-13	year	5.700	micro-seconds ( x⁻⁶ )	100.000'000	%	SF	?	keV	V	²⁵⁰No > [ 100 % , SF , ? keV ] > V	α	8,950.000	keV	²⁴⁶Fm	²⁵⁰No > [ , α , 8,950.0 keV ] > ²⁴⁶Fm	0.000'250	%	β+	1,857.000	keV	²⁵⁰Md	²⁵⁰No > [ 0.00025 % , β+ , 1,857.0 keV ] > ²⁵⁰Md	0.000'018	%	²⁰⁶Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_102_no_251_u	Unstable	²⁵¹No	Fermion	102	p	149	n	7/2	1	251.089'012'000'0	u	~ 0	%	~ 0	81.516'000'000'0	MeV	7.426'000'000'0	MeV	-	-	2.41E-8	year	760.000	milli-seconds ( x⁻³ )	83.000'000	%	α	8,907.000	keV	²⁴⁷Fm	²⁵¹No > [ 83 % , α , 8,907.0 keV ] > ²⁴⁷Fm	β+	2,865.000	keV	²⁵¹Md	²⁵¹No > [ , β+ , 2,865.0 keV ] > ²⁵¹Md	0.300'000	%	SF	?	keV	V	²⁵¹No > [ 0.3 % , SF , ? keV ] > V	99.614'354	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_102_no_252_u	Unstable	²⁵²No	Boson	102	p	150	n	0	1	252.088'976'521'0	u	~ 0	%	~ 0	82.914'000'000'0	MeV	7.423'000'000'0	MeV	-	-	7.73E-8	year	2.440	seconds ( x⁰ )	67.000'000	%	α	8,549.770	keV	²⁴⁸Fm	²⁵²No > [ 67 % , α , 8,549.77 keV ] > ²⁴⁸Fm	SF	?	keV	V	²⁵²No > [ , SF , ? keV ] > V	?	%	β+	1,229.000	keV	²⁵²Md	²⁵²No > [ ? % , β+ , 1,229.0 keV ] > ²⁵²Md	67.325'969	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg	85.346'466	%	²⁰⁸Pb
Isotope_102_no_253_u	Unstable	²⁵³No	Fermion	102	p	151	n	9/2	-1	253.090'678'000'0	u	~ 0	%	~ 0	82.881'097'000'0	MeV	7.425'760'000'0	MeV	-	-	3.08E-6	year	97.200	seconds ( x⁰ )	80.000'000	%	α	8,421.330	keV	²⁴⁹Fm	²⁵³No > [ 80 % , α , 8,421.33 keV ] > ²⁴⁹Fm	β+	2,143.000	keV	²⁵³Md	²⁵³No > [ , β+ , 2,143.0 keV ] > ²⁵³Md	0.001'000	%	SF	?	keV	V	²⁵³No > [ 0.001 % , SF , ? keV ] > V	100.462'191	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_102_no_254_u	Unstable	²⁵⁴No	Boson	102	p	152	n	0	1	254.090'955'253'0	u	~ 0	%	~ 0	84.466'000'000'0	MeV	7.422'000'000'0	MeV	-	-	1.62E-6	year	51.000	seconds ( x⁰ )	90.000'000	%	α	8,225.800	keV	²⁵⁰Fm	²⁵⁴No > [ 90 % , α , 8,225.8 keV ] > ²⁵⁰Fm	β+	188.000	keV	²⁵⁴Md	²⁵⁴No > [ , β+ , 188.0 keV ] > ²⁵⁴Md	0.170'000	%	SF	?	keV	V	²⁵⁴No > [ 0.17 % , SF , ? keV ] > V	99.777'284	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_102_no_255_u	Unstable	²⁵⁵No	Fermion	102	p	153	n	1/2	1	255.093'241'131'0	u	~ 0	%	~ 0	84.724'274'000'0	MeV	7.423'586'000'0	MeV	-	-	6.02E-6	year	190.020	seconds ( x⁰ )	61.000'000	%	α	8,442.000	keV	²⁵¹Fm	²⁵⁵No > [ 61 % , α , 8,442.0 keV ] > ²⁵¹Fm	β+	988.360	keV	²⁵⁵Md	²⁵⁵No > [ , β+ , 988.36 keV ] > ²⁵⁵Md								100.276'700	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_102_no_256_u	Unstable	²⁵⁶No	Boson	102	p	154	n	0	1	256.094'282'666'0	u	~ 0	%	~ 0	86.853'555'000'0	MeV	7.417'776'000'0	MeV	-	-	5.53E-6	year	174.600	seconds ( x⁰ )	100.000'000	%	α	8,581.440	keV	²⁵²Fm	²⁵⁶No > [ 100 % , α , 8,581.44 keV ] > ²⁵²Fm	SF	?	keV	V	²⁵⁶No > [ , SF , ? keV ] > V	0.010'000	%	ϵ	208.300	keV	²⁵⁶Md	²⁵⁶No > [ 0.01 % , ϵ , 208.3 keV ] > ²⁵⁶Md	100.004'813	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb
Isotope_102_no_257_u	Unstable	²⁵⁷No	Fermion	102	p	155	n	7/2	1	257.096'877'190'0	u	~ 0	%	~ 0	87.823'739'000'0	MeV	7.416'539'000'0	MeV	-	-	7.92E-7	year	25.000	seconds ( x⁰ )	85.000'000	%	α	8,466.100	keV	²⁵³Fm	²⁵⁷No > [ 85 % , α , 8,466.1 keV ] > ²⁵³Fm	β+	222.100	keV	²⁵⁷Md	²⁵⁷No > [ , β+ , 222.1 keV ] > ²⁵⁷Md								100.056'084	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_102_no_258_u	Unstable	²⁵⁸No	Boson	102	p	156	n	0	1	258.098'207'000'0	u	~ 0	%	~ 0	90.240'522'000'0	MeV	7.409'683'000'0	MeV	-	-	3.80E-11	year	1.200	milli-seconds ( x⁻³ )	100.000'000	%	SF	?	keV	V	²⁵⁸No > [ 100 % , SF , ? keV ] > V	α	8,150.000	keV	²⁵⁴Fm	²⁵⁸No > [ , α , 8,150.0 keV ] > ²⁵⁴Fm	?	%	2β+	-991.000	keV	²⁵⁸Fm	²⁵⁸No > [ ? % , 2β+ , -991.0 keV ] > ²⁵⁸Fm	0.001'000	%	²⁰⁶Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_102_no_259_u	Unstable	²⁵⁹No	Fermion	102	p	157	n	9/2	1	259.101'031'000'0	u	~ 0	%	~ 0	91.479'000'000'0	MeV	7.407'000'000'0	MeV	-	-	3.08E-9	year	97.200	milli-seconds ( x⁻³ )	75.000'000	%	α	7,885.000	keV	²⁵⁴Fm	²⁵⁹No > [ 75 % , α , 7,885.0 keV ] > ²⁵⁴Fm	ϵ	486.000	keV	²⁵⁹Md	²⁵⁹No > [ , ϵ , 486.0 keV ] > ²⁵⁹Md	10.000'000	%	SF	?	keV	V	²⁵⁹No > [ 10 % , SF , ? keV ] > V	75.533'133	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_102_no_260_u	Unstable	²⁶⁰No	Boson	102	p	158	n	0	1	260.102'643'000'0	u	~ 0	%	~ 0	94.109'000'000'0	MeV	7.400'000'000'0	MeV	-	-	3.36E-9	year	106.000	milli-seconds ( x⁻³ )																													0.000'000	%	²⁰⁸Pb
Isotope_102_no_261_u	Unstable	²⁶¹No	Fermion	102	p	159	n	3/2	1	261.105'749'000'0	u	~ 0	%	~ 0	95.611'000'000'0	MeV	7.397'000'000'0	MeV	-	-	3.17E-4	year	10.008	kilo-seconds ( x³ )	?	%	α	7,490.000	keV	²⁵⁷Fm	²⁶¹No > [ ? % , α , 7,490.0 keV ] > ²⁵⁷Fm													?	%	²⁰⁵Tl	?	%	²⁰⁷Pb
Isotope_102_no_262_u	Unstable	²⁶²No	Boson	102	p	160	n	0	1	262.107'301'000'0	u	~ 0	%	~ 0	98.504'000'000'0	MeV	7.388'000'000'0	MeV	-	-	1.58E-10	year	5.000	milli-seconds ( x⁻³ )	100.000'000	%	SF	?	keV	V	²⁶²No > [ 100 % , SF , ? keV ] > V	α	7,100.000	keV	²⁵⁸Fm	²⁶²No > [ , α , 7,100.0 keV ] > ²⁵⁸Fm								?	%	¹⁷²Yb	?	%	²⁰⁵Tl	?	%	²⁰⁸Pb
Isotope_102_no_263_u	Unstable	²⁶³No	Fermion	102	p	161	n	?	0	263.110'552'000'0	u	~ 0	%	~ 0	99.951'000'000'0	MeV	7.385'000'000'0	MeV	-	-	3.80E-5	year	1.200	kilo-seconds ( x³ )	?	%	α	6,850.000	keV	²⁵⁹Fm	²⁶³No > [ ? % , α , 6,850.0 keV ] > ²⁵⁹Fm	SF	?	keV	V	²⁶³No > [ , SF , ? keV ] > V																	?	%	²⁰⁶Pb	?	%	¹⁷⁶Hf	?	%	¹⁶⁰Dy	?	%	¹⁴⁰Ce	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_102_no_264_u	Unstable	²⁶⁴No	Boson	102	p	162	n	0	1	264.112'345'000'0	u	~ 0	%	~ 0	102.979'000'000'0	MeV	7.376'000'000'0	MeV	-	-	1.90E-6	year	60.000	seconds ( x⁰ )	?	%	α	6,580.000	keV	²⁶⁰Fm	²⁶⁴No > [ ? % , α , 6,580.0 keV ] > ²⁶⁰Fm	SF	?	keV	V	²⁶⁴No > [ , SF , ? keV ] > V

102 – Nobelium, No

102 – Nobelium, No

102 – Nobelium, No

102 – Nobelium, No

102 – Nobelium, No

Spectrograph

Elemental Tile

Nobelium

Spectrograph

Elemental Tile

Nobelium

Spectrograph

Elemental Tile

Nobelium

Spectrograph

Elemental Tile

Nobelium

Spectrograph

Elemental Tile

Nobelium