Symbol	Hs
Atomic number	108
Group	8 (Iron group)
Period	7
Block	d
Classification	Transition Metal

Appearance	-
Color	-

Number of protons	108 p+
Number of neutrons	161 n0
Number of electrons	108 e-

From Wikipedia, the free encyclopediaHassium 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.

Phase at STP	Solid
Density	40.7 g/cm3
Atomic weight	269 u

Melting point	126 K -147.15 °C -232.87 °F
Boiling point	-
Heat of vaporization	-

Electronegativity (Pauling Scale)	-
Electron affinity	-
Oxidation states	(+2), (+3), (+4), (+6), +8 (prediction)
Ionization energies	733.3 kJ/mol 1756.0 kJ/mol 2827.0 kJ/mol 3637.5 kJ/mol 4940.0 kJ/mol 6175.1 kJ/mol 7535.5 kJ/mol 8857.4 kJ/mol

Electron configuration Shorthand configuration	[Rn] 5f14 6d6 7s2
Electron configuration Full configuration	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d6 7s2
Electron configuration chart	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d6 7s2
Electrons per shell	2, 8, 18, 32, 32, 14, 2
Valence electrons	2
Valency electrons
Bohr model	Figure: Shell diagram of Hassium (Hs) atom.
Orbital Diagram 1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 6d 7s

Discovery

Gesellschaft für Schwerionenforschung (1984)

CAS Number	54037-57-9
ChemSpider ID	-
EC number	-
PubChem CID Number	56951714