Periodic Table/Hassium
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108Hs269 Da

Hassium

Transition Metal·Period 7, Group 8·s-block

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.

Gallery

No Image Found

Chemical Elements A Virtual Museum under a Creative Commons Attribution 3.0 Unported License, source: https://images-of-elements.com/hassium.php

Bohr model of Hassium

Physical Propertiesmass · density · phase · crystal

Atomic Mass

269Da

Density

40.7000g/cm³

Phase (STP)

Solid

Melting Point

—

Boiling Point

—

Molar Heat

—

Crystal Structure

—

Atomic Radiiatomic · covalent · van der Waals

Atomic (Empirical)

—

Covalent

134.00pm

Van der Waals

—

Electronic Propertieselectronegativity · ionization · affinity

Electron Configuration

[Rn] 5f14 6d6 7s2

Electron Shells

2, 8, 18, 32, 32, 14, 2

Electronegativity

—

Electron Affinity

—

1st Ionization Energy

7.6kJ/mol

Oxidation States

+8

Orbital DiagramAufbau · Hund's rule · Pauli exclusion

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

Full: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 5f14 6d6 7s2Short: [Rn] 5f14 6d6 7s2

Ionization Energies (73 known)

1st7.6 kJ/mol2nd18.2 kJ/mol3rd29.3 kJ/mol4th37.7 kJ/mol5th51.2 kJ/mol6th64.0 kJ/mol7th78.1 kJ/mol8th91.7 kJ/mol9th159.9 kJ/mol10th173.9 kJ/mol11th206.1 kJ/mol12th227.0 kJ/mol13th258.0 kJ/mol14th285.0 kJ/mol15th314.0 kJ/mol16th351.0 kJ/mol17th371.0 kJ/mol18th409.0 kJ/mol19th984.0 kJ/mol20th1020.0 kJ/mol21th1060.0 kJ/mol22th1101.0 kJ/mol23th1140.0 kJ/mol24th1180.0 kJ/mol25th1253.0 kJ/mol26th1294.0 kJ/mol27th1338.0 kJ/mol28th1379.0 kJ/mol29th4339.0 kJ/mol30th4425.0 kJ/mol31th4516.0 kJ/mol32th4610.0 kJ/mol33th4700.0 kJ/mol34th4790.0 kJ/mol35th5020.0 kJ/mol36th5110.0 kJ/mol37th5220.0 kJ/mol38th5310.0 kJ/mol39th5700.0 kJ/mol40th5780.0 kJ/mol41th5880.0 kJ/mol42th5980.0 kJ/mol43th6840.0 kJ/mol44th6950.0 kJ/mol45th7230.0 kJ/mol46th7340.0 kJ/mol47th11200.0 kJ/mol48th11390.0 kJ/mol49th11610.0 kJ/mol50th11830.0 kJ/mol51th12040.0 kJ/mol52th12250.0 kJ/mol53th12910.0 kJ/mol54th13130.0 kJ/mol55th13400.0 kJ/mol56th13600.0 kJ/mol57th14200.0 kJ/mol58th14400.0 kJ/mol59th14600.0 kJ/mol60th14800.0 kJ/mol61th17500.0 kJ/mol62th17700.0 kJ/mol63th18200.0 kJ/mol64th18400.0 kJ/mol65th35900.0 kJ/mol66th36400.0 kJ/mol67th37000.0 kJ/mol68th37500.0 kJ/mol69th47300.0 kJ/mol70th48100.0 kJ/mol71th49000.0 kJ/mol72th191784.0 kJ/mol73th194911.0 kJ/molSuccessive Ionization Energies

Abundanceby mass

Biological Role

No biological role

Synthetic, radioactive element. No biological role.

Discovery

Discovered By

Heavy Ion Research Laboratory (HIRL)

Named By

—

Year

1984

Nuclear Data

Known Isotopes

18

Stable Isotopes

0

Stable Mass Numbers

None

Isotopes of Hs18 known

NuclideZNMass (AMU)Half-lifeDecayJπAbundance
263Hs108155263.128479900 μsα (1%), SF3/2+—
264Hs108156264.128356700 msα (0.7%), SF (0.3%)0+—
265Hs108157265.1297921.96 msα (1%), SF3/2+—
278Hs108170278.153753UnknownSF (1%), α0+—
279Hs108171279.157274Unknownα, SF——
280Hs108172280.159335Unknownα, SF0+—

Click any isotope for its full page with decay chain:

263Hs264Hs265Hs266Hs267Hs268Hs269Hs270Hs271Hs272Hs273Hs274Hs275Hs276Hs277Hs278Hs279Hs280Hs
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