Periodic System for Chemists

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Table
108
269.00

Hs

Hassium

Identification

CAS Number: 54037-57-9
Discovery Year: 1984
Discoverer: Heavy Ion Research Laboratory (HIRL)
Discovery Location: Germany

Properties

Atomic Mass: 269 →Density: 40.7 g/cm³ →

Electronic Structure

Electron Config: [Rn] 5f14 6d6 7s2
Block: d
Period: 7 →Group: 8 →

Abundance & Geochemistry

Goldschmidt Class: synthetic

About

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.

Isotopes

Hs-269 269 ☢ 27.0 s
Hs-270 270 ☢ 30.0 s

Related Elements

Category

Transition Metals

Same Group

26 Fe Iron44 Ru Ruthenium76 Os Osmium

Same Period

105 Db Dubnium106 Sg Seaborgium107 Bh Bohrium109 Mt Meitnerium110 Ds Darmstadtium111 Rg Roentgenium

Periodic Trends

Electronegativity →Atomic Radius →Density →Melting Point →

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