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^-

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

Chemical Properties

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ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹⁴ 6d⁶ 7s²

Oxidation States	8
Electronegativity
Electrophilicity Index
States of Matter

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's 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
Natural Isotopes	0

²⁶³Hs

Mass Number	263
Neutron Number	155
Relative Atomic Mass	263.128479 ± 0.000212 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	0.9 ± 0.4 ms
Spin	3/2
Quadrupole Moment
Discovery Year	2009
Parity	+

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

²⁶⁴Hs

Mass Number	264
Neutron Number	156
Relative Atomic Mass	264.12835633 ± 0.000031005 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	0.7 ± 0.3 s
Spin	0
Quadrupole Moment	0
Discovery Year	1986
Parity	+

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

²⁶⁵Hs

Mass Number	265
Neutron Number	157
Relative Atomic Mass	265.129791744 ± 0.000025719 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.96 ± 0.16 ms
Spin	3/2
Quadrupole Moment
Discovery Year	1984
Parity	+

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

²⁶⁶Hs

Mass Number	266
Neutron Number	158
Relative Atomic Mass	266.130048783 ± 0.000029099 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	3 ± 0.6 ms
Spin	0
Quadrupole Moment	0
Discovery Year	2001
Parity	+

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

²⁶⁷Hs

Mass Number	267
Neutron Number	159
Relative Atomic Mass	267.131678 ± 0.000102 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	55 ± 11 ms
Spin
Quadrupole Moment
Discovery Year	1995
Parity

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

²⁶⁸Hs

Mass Number	268
Neutron Number	160
Relative Atomic Mass	268.132011 ± 0.000322 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.4 ± 1.1 s
Spin	0
Quadrupole Moment	0
Discovery Year	2010
Parity	+

Decay Mode	Intensity
α (α emission)	100%

²⁶⁹Hs

Mass Number	269
Neutron Number	161
Relative Atomic Mass	269.133649 ± 0.000141 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	15 ± 7 s
Spin	9/2
Quadrupole Moment
Discovery Year	1996
Parity	+

Decay Mode	Intensity
α (α emission)	100%

²⁷⁰Hs

Mass Number	270
Neutron Number	162
Relative Atomic Mass	270.134313 ± 0.000266 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	9 ± 4 s
Spin	0
Quadrupole Moment	0
Discovery Year	2003
Parity	+

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

²⁷¹Hs

Mass Number	271
Neutron Number	163
Relative Atomic Mass	271.137082 ± 0.000296 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin
Quadrupole Moment
Discovery Year	2008
Parity

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

²⁷²Hs

Mass Number	272
Neutron Number	164
Relative Atomic Mass	272.138492 ± 0.000547 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

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

²⁷³Hs

Mass Number	273
Neutron Number	165
Relative Atomic Mass	273.141458 ± 0.000401 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	1,060 ± 500 ms
Spin
Quadrupole Moment
Discovery Year	2010
Parity

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

²⁷⁴Hs

Mass Number	274
Neutron Number	166
Relative Atomic Mass	274.143217 ± 0.000504 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

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

²⁷⁵Hs

Mass Number	275
Neutron Number	167
Relative Atomic Mass	275.14653 ± 0.000637 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	280 ± 130 ms
Spin
Quadrupole Moment
Discovery Year	2004
Parity

Decay Mode	Intensity
α (α emission)	100%

²⁷⁶Hs

Mass Number	276
Neutron Number	168
Relative Atomic Mass	276.148348 ± 0.000773 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

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

²⁷⁷Hs

Mass Number	277
Neutron Number	169
Relative Atomic Mass	277.151772 ± 0.00048 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	12 ± 9 ms
Spin
Quadrupole Moment
Discovery Year	2010
Parity

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

²⁷⁸Hs

Mass Number	278
Neutron Number	170
Relative Atomic Mass	278.153753 ± 0.000322 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2016
Parity	+

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

²⁷⁹Hs

Mass Number	279
Neutron Number	171
Relative Atomic Mass	279.157274 ± 0.000644 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

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

²⁸⁰Hs

Mass Number	280
Neutron Number	172
Relative Atomic Mass	280.159335 ± 0.000644 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

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
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

Hs
element 108
unniloctium
Uno

Translations

Norwegian Bokmålhassium
Frenchhassium
Norwegian Nynorskhassium
GermanHassium
Spanishhasio
Swedishhassium
Danishhassium
Italianhassio
Hungarianhasszium
Dutchhassium
Amharicሀሲየም
Aragonesehassio
Arabicهاسيوم
Azerbaijanihassium
Belarusianхасій
Bulgarianхасий
Banglaহ্যাসিয়াম
Bosnianhasij
Catalanhassi
Corsicanhassiu
Czechhassium
ChuvashХасси
Welshhasiwm
Greekχάσιο
Esperantohasio
Estonianhassium
Basquehassio
Persianهاسیم
Finnishhassium
Friulianhassi
Irishhaisiam
Galicianhassio
Manxhassium
Hakka Chinesehassium
Hebrewהאסיום
Fiji Hindihassium
Croatianhasij
Haitian Creoleasyòm
Armenianհասիում
Interlinguahassium
Indonesianhasium
Idohasio
Japaneseハッシウム
Lojbanjinmrxasi
Javanesehassium
Kannadaಹಾಸ್ಸಿಯಮ್
Korean하슘
Kurdishhasiyûm
Komiхассий
Latinhassium
LuxembourgishHassium
Ligurianhassio
Lithuanianhasis
Latvianhasijs
Malayalamഹാസ്സിയം
Mongolianхасси
Marathiहासियम
Western Mariхассий
Malayhasium
Polishhas
Portuguesehássio
Quechuahasyu
Romanianhassiu
Russianхассий
Sicilianassiu
Serbo-Croatianhasijum
Slovakhassium
Slovenianhasij
Albanianhassiumi
Serbianхасијум
Saterland Frisianhassium
Tamilஆசியம்
Thaiฮัสเซียม
Turkishhassiyum
Uyghurھاسسىي
Ukrainianгасій
Urduہاسیئم
Vepshassii
Vietnamesehassi
Warayhassyo
Kalmykхассиум
YorubaHassiomu
Chinese𨭆
Bretonhasiom
Cebuanohassyo
Macedonianхасиум
Central Kurdishھاسیۆم
Odiaହାସିଅମ
Gujaratiહેસીયમ
Occitanassi
Tatarһассий
Western Panjabiہاسیم
Hindiहैसियम
Somalihasiyaam
Kazakhхассий
Newariह्यासियम
Cantonese𨭆
Belarusian (Taraskievica orthography)Гас
Chinese (China)𬭶
Chinese (Simplified)𬭶
Chinese (Taiwan)𨭆
Chinese (Hong Kong SAR China)𨭆
Chinese (Traditional)𨭆
AromanianHassiu
Kyrgyzхассий
Faroesehassium
Nepaliह्यासियम
Sanskritह्यासियम
Maltesehassju
Scottish Gaelichassium
Paliह्यासियम
Bhojpuriहस्सियम
Teluguహాసియం
Limburgishhassium
cdohassium
Min Nan ChineseHassium
Uzbekхassiy
Asturianhassiu
English (United Kingdom)hassium
Chinese (Macao SAR China)𨭆
Chinese (Malaysia)𬭶
Chinese (Singapore)𬭶
Portuguese (Brazil)hássio
Tibetanཧ་སིམ།
Literary Chinese𨭆
Tagaloghasyo
kbphasɩyɔm
Afrikaanshassium
Lingua Franca Novahasio
Northern Frisianhassium
Volapükhasin
Low GermanHassium
Icelandichassín
TajikҲассий
Georgianჰასიუმი
Wu Chinese𬭶
SardinianHàssiu
SwahiliHassi
Burmeseဟက်စ်စီယမ်
Moroccan Arabicهاسيوم
Pashtoهاسيوم
Egyptian Arabicهاسيوم
CornishHassiom
BalineseHassium
BikolHasyo

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)

Physical Properties

Chemical Properties

Other

Isotopes of Hassium

263Hs

264Hs

265Hs

266Hs

267Hs

268Hs

269Hs

270Hs

271Hs

272Hs

273Hs

274Hs

275Hs

276Hs

277Hs

278Hs

279Hs

280Hs