Hassium (Hs)

Hassium is the 108th element in the periodic table and has a symbol of Hs and atomic number of 108. It has an atomic weight of (269) and a mass number of 263. Hassium has one hundred eight protons and one hundred fifty-five neutrons in its nucleus, and one hundred eight electrons in seven shells. It is located in group eight, period seven and block d of the periodic table. Radioactive transition metal first synthesized in 1984 by a German research team led by Peter Armbruster and Gottfried Muenzenberg at the Institute for Heavy Ion Research at Darmstadt.

Atomic Number	108
Atomic Weight	269
Mass Number	263

Group	8
Period	7
Block	d

Protons	108 p⁺
Neutrons	155 n⁰
Electrons	108 e^-

Properties

Physical Properties
Atomic Radius
Molar Volume
Covalent Radius	134 pm 125 pm 118 pm
Metallic Radius
Ionic Radius
Crystal Radius
Van der Waals Radius
Density	40.7 g/cm³
Energy
Proton Affinity
Electron Affinity
Ionization Energy	7.6 eV/particle 18.2 eV/particle 29.3 eV/particle 37.7 eV/particle 51.2 eV/particle 64 eV/particle 78 eV/particle 92 eV/particle 160 eV/particle 173.9 eV/particle 206.1 eV/particle 227 eV/particle 258 eV/particle 285 eV/particle 314 eV/particle 351 eV/particle 371 eV/particle 409 eV/particle 984 eV/particle 1,020 eV/particle 1,060 eV/particle 1,101 eV/particle 1,140 eV/particle 1,180 eV/particle 1,253 eV/particle 1,294 eV/particle 1,338 eV/particle 1,379 eV/particle 4,339 eV/particle 4,425 eV/particle 4,516 eV/particle 4,610 eV/particle 4,700 eV/particle 4,790 eV/particle 5,020 eV/particle 5,120 eV/particle 5,220 eV/particle 5,310 eV/particle 5,700 eV/particle 5,780 eV/particle 5,880 eV/particle 5,980 eV/particle 6,840 eV/particle 6,950 eV/particle 7,230 eV/particle 7,340 eV/particle 11,200 eV/particle 11,390 eV/particle 11,600 eV/particle 11,830 eV/particle 12,040 eV/particle 12,250 eV/particle 12,900 eV/particle 13,130 eV/particle 13,400 eV/particle 13,600 eV/particle 14,200 eV/particle 14,400 eV/particle 14,600 eV/particle 14,800 eV/particle 17,500 eV/particle 17,700 eV/particle 18,200 eV/particle 18,400 eV/particle 35,900 eV/particle 36,400 eV/particle 37,000 eV/particle 37,500 eV/particle 47,300 eV/particle 48,100 eV/particle 49,000 eV/particle 194,917 eV/particle

Heat of Vaporization
Heat of Fusion
Heat of Formation
Electrons
Electron Shells	2, 8, 18, 32, 32, 14, 2

Valence Electrons	2
Electron Configuration	[Rn] 5f¹⁴ 6d⁶ 7s²

Oxidation States	8
Electronegativity
Electrophilicity
Phases
Phase	Solid
Gas Phase
Boiling Point
Melting Point
Critical Pressure
Critical Temperature
Triple Point
Visual
Hassium is a Colorless. Hs has a Jmol of #e6002e.
Color	Colorless #e6002e
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 Hassium is .
Crystal Structure	()
Lattice Constant
Lattice Angles
Mechanical Properties

Hardness
Bulk Modulus
Shear Modulus
Young Modulus
Poisson Ratio
Speed of Sound
Classification
The CAS Group of Hassium is VIIIA. The IUPAC Group of Hs is VIII. The Mendeleev Number of Element 108 is 62. The Goldschmidt Class of Hassium (Hs) is synthetic.
Category	Transition metals, Transition metals
CAS Group	VIIIA
IUPAC Group	VIII
Glawe Number
Mendeleev Number	62
Pettifor Number
Geochemical Class
Goldschmidt Class	synthetic
Other
The Dipole Polarizability of Hassium is 36 plus or minus 4 a₀. The Allotropes of Hs is . The Quantum Numbers of Element 108 is 5D4. The Space Group of Hassium (Hs) is ().
Gas Basicity
Dipole Polarizability	36 ± 4 a₀
C6 Dispersion Coefficient
Allotropes
Neutron Cross Section
Neutron Mass Absorption
Quantum Numbers	5D4
Space Group	()

Isotopes of Hassium

Stable Isotopes	0
Unstable Isotopes	18
Radioactive Isotopes	18

²⁶³Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	263.128479 ± 0.000212 Da
Mass Number	263
G-Factor
Half Life	0.9 ± 0.4 ms
Spin	3/2
Quadrupole Moment
Discovery Year	2009
Parity	+

²⁶³Hs Decay Modes

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

²⁶⁴Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	264.12835633 ± 0.000031005 Da
Mass Number	264
G-Factor	0
Half Life	0.7 ± 0.3 s
Spin	0
Quadrupole Moment	0
Discovery Year	1986
Parity	+

²⁶⁴Hs Decay Modes

Decay Mode	Intensity
α (α emission)	70%
SF (spontaneous fission)	30%

²⁶⁵Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	265.129791744 ± 0.000025719 Da
Mass Number	265
G-Factor
Half Life	1.96 ± 0.16 ms
Spin	3/2
Quadrupole Moment
Discovery Year	1984
Parity	+

²⁶⁵Hs Decay Modes

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

²⁶⁶Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	266.130048783 ± 0.000029099 Da
Mass Number	266
G-Factor	0
Half Life	3 ± 0.6 ms
Spin	0
Quadrupole Moment	0
Discovery Year	2001
Parity	+

²⁶⁶Hs Decay Modes

Decay Mode	Intensity
α (α emission)	76%
SF (spontaneous fission)	24%

²⁶⁷Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	267.131678 ± 0.000102 Da
Mass Number	267
G-Factor
Half Life	55 ± 11 ms
Spin
Quadrupole Moment
Discovery Year	1995
Parity

²⁶⁷Hs Decay Modes

Decay Mode	Intensity
α (α emission)	80%
SF (spontaneous fission)	%

²⁶⁸Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	268.132011 ± 0.000322 Da
Mass Number	268
G-Factor	0
Half Life	1.4 ± 1.1 s
Spin	0
Quadrupole Moment	0
Discovery Year	2010
Parity	+

²⁶⁸Hs Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²⁶⁹Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	269.133649 ± 0.000141 Da
Mass Number	269
G-Factor
Half Life	15 ± 7 s
Spin	9/2
Quadrupole Moment
Discovery Year	1996
Parity	+

²⁶⁹Hs Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²⁷⁰Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	270.134313 ± 0.000266 Da
Mass Number	270
G-Factor	0
Half Life	9 ± 4 s
Spin	0
Quadrupole Moment	0
Discovery Year	2003
Parity	+

²⁷⁰Hs Decay Modes

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

²⁷¹Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	271.137082 ± 0.000296 Da
Mass Number	271
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year	2008
Parity

²⁷¹Hs Decay Modes

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

²⁷²Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	272.138492 ± 0.000547 Da
Mass Number	272
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁷²Hs Decay Modes

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

²⁷³Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	273.141458 ± 0.000401 Da
Mass Number	273
G-Factor
Half Life	1,060 ± 500 ms
Spin
Quadrupole Moment
Discovery Year	2010
Parity

²⁷³Hs Decay Modes

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

²⁷⁴Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	274.143217 ± 0.000504 Da
Mass Number	274
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁷⁴Hs Decay Modes

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

²⁷⁵Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	275.14653 ± 0.000637 Da
Mass Number	275
G-Factor
Half Life	280 ± 130 ms
Spin
Quadrupole Moment
Discovery Year	2004
Parity

²⁷⁵Hs Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²⁷⁶Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	276.148348 ± 0.000773 Da
Mass Number	276
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁷⁶Hs Decay Modes

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

²⁷⁷Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	277.151772 ± 0.00048 Da
Mass Number	277
G-Factor
Half Life	12 ± 9 ms
Spin
Quadrupole Moment
Discovery Year	2010
Parity

²⁷⁷Hs Decay Modes

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

²⁷⁸Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	278.153753 ± 0.000322 Da
Mass Number	278
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2016
Parity	+

²⁷⁸Hs Decay Modes

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

²⁷⁹Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	279.157274 ± 0.000644 Da
Mass Number	279
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

²⁷⁹Hs Decay Modes

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

²⁸⁰Hs

Abundance	Radioactive ☢️
Relative Atomic Mass	280.159335 ± 0.000644 Da
Mass Number	280
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁸⁰Hs Decay Modes

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

History

Hassium was first synthesized in 1984 by a German research team led by Peter Armbruster and Gottfried Münzenberg at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung) in Darmstadt. The team bombarded a target of lead-208 with accelerated nuclei of iron-58 to produce 3 atoms of the isotope hassium-265. From the Latin word Hassias meaning Hess, the German state

Discoverers	Heavy Ion Research Laboratory (HIRL)
Discovery Location	Germany
Discovery Year	1984
Etymology (Name Origin)	Named in honor of Henri Hess, Swiss born Russian chemist known for work in thermodydamics.
Pronunciation	HES-i-em (English)

Hassium is harmful due to its radioactivity

More than 100 atoms of hassium have been synthesized to date

Uses

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

Sources

Formed by the bombardment of lead-208 with iron-58.

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

Hassium on ChemicalAid

Australian Educational Vocabulary ID	scot/3527
CAS Registry Number	54037-57-9
DSSTOX compound identifier	DTXCID601323015
DSSTox substance ID	DTXSID10893066
Den Store Danske ID	hassium
Elhuyar ZTH ID	064405
Encyclopædia Britannica Online ID	science/hassium
Freebase ID	/m/025rtwf
French Vikidia ID	Hassium
GND ID	4518309-0
Great Russian Encyclopedia Online ID	4730829
KBpedia ID	Hassium
Library of Congress authority ID	sh2012003723
National Library of Israel J9U ID	987007595442705171
OmegaWiki Defined Meaning	160082
Quora topic ID	Hassium
Store norske leksikon ID	hassium
Treccani ID	hassio
USGS Thesaurus ID	1468
WordNet 3.1 Synset ID	14663973-n

Hassium (Hs)

Properties

Isotopes of Hassium

263Hs

263Hs Decay Modes

264Hs

264Hs Decay Modes

265Hs

265Hs Decay Modes

266Hs

266Hs Decay Modes

267Hs

267Hs Decay Modes

268Hs

268Hs Decay Modes

269Hs

269Hs Decay Modes

270Hs

270Hs Decay Modes

271Hs

271Hs Decay Modes

272Hs

272Hs Decay Modes

273Hs

273Hs Decay Modes

274Hs

274Hs Decay Modes

275Hs

275Hs Decay Modes

276Hs

276Hs Decay Modes

277Hs

277Hs Decay Modes

278Hs

278Hs Decay Modes

279Hs

279Hs Decay Modes

280Hs

280Hs Decay Modes