Symbol	Mt
Atomic number	109
Group	9 (Cobalt group)
Period	7
Block	d
Classification	Unknown

Appearance	-
Color	-

Number of protons	109 p+
Number of neutrons	168 n0
Number of electrons	109 e-

From Wikipedia, the free encyclopediaMeitnerium is a chemical element with symbol Mt and atomic number 109. It is an extremely radioactive synthetic element (an element not found in nature that can be created in a laboratory). The most stable known isotope, meitnerium-278, has a half-life of 7.6 seconds.

Phase at STP	Solid
Density	37.4 g/cm3
Atomic weight	277.154 u

Melting point	-
Boiling point	-
Heat of vaporization	-

Electronegativity (Pauling Scale)	-
Electron affinity	-
Oxidation states	(+1), (+3), (+4), (+6), (+8), (+9) (predicted)
Ionization energies	800.8 kJ/mol 1823.6 kJ/mol 2904.2 kJ/mol 3859.4 kJ/mol 4920.8 kJ/mol

Electron configuration Shorthand configuration	[Rn] 5f14 6d7 7s2
Electron configuration Full configuration	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d7 7s2
Electron configuration chart	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d7 7s2
Electrons per shell	2, 8, 18, 32, 32, 15, 2
Valence electrons
Valency electrons
Bohr model	Figure: Shell diagram of Meitnerium (Mt) 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 (1982)

CAS Number	54038-01-6
ChemSpider ID	-
EC number	-
PubChem CID Number	56951716