Hs
Hassium · element 108
Transition Metal · Solid at room temperature
Hassium is a chemical element with symbol Hs and atomic number 108, named after the German state of Hesse. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds, although an unconfirmed metastable state, 277mHs, may have a longer half-life of about 130 seconds. More than 100 atoms of hassium have been synthesized to date.
Key facts
Atomic mass
269 u
how heavy one atom is
Phase (room temp.)
Solid
Density
40.7 g/cm³
how tightly packed it is
Melting point
126 K (-147 °C)
when solid turns to liquid
Period
7
its row in the periodic table
Group
8
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electron configuration
*[Rn] 5f14 6d6 7s2
where its electrons live
Shells
2 · 8 · 18 · 32 · 32 · 14 · 2
electrons in each layer, inside to out
Discovered by
Gesellschaft für Schwerionenforschung
who found it
Source: Wikipedia