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Meitnerium


Aluminium Alloy Sections in Russia  Aluminium alloy sections in Russia
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Ferrochrome market research in the CIS  Ferrochrome market in CIS
Atomic symbol: Mt
Atomic number: 109
Atomic weight: (266)
Atomic volume: ?
Density: ?
Period Number: 7
Group number: 9
Group name: Trans. Met.
Element classification: Metal


States


Phase at room temperature: Solid
Melting Point: ?
Boiling point: ?
Heat of fusion: ?
Heat of vaporization: ?


Energies


Ionization Energy: Unknown
1st ionization energy: ?
2nd ionization energy: ?
3rd ionization energy: ?
Electronegativity: ?
Electron affinity: ?
Specific heat: ?
Heat atomization: ?


Oxidation & Electrons


Shells: 2,8,18,32,32,15,2
Electron Shell Configuration: [Rn] 5f14 6d7 7s2
Minimum oxidation number: ?
Maximum oxidation number: ?
Minimum common oxidation number: ?
Maximum common oxidation no: ?


Appearance & Characteristics


Structure:: unknown
Color: unknown
Hardness: unknown
Toxicity: unknown
Characteristics: synthetically prepared
Uses: unknown


Reactions


Reaction with air: ?
Reaction with 6M HCl: ?
Reaction with 15M HNO3: ?
Reaction with 6M NaOH: ?


Other Forms


Number of isotopes: 0
Oxide(s): ?
Hydride(s): ?
Chloride(s): ?


Radius


Atomic Radius: ?
Ionic radius (1- ion): ?
Ionic radius (1+ ion): ?
Ionic radius (2- ion): ?
Ionic radius (2+ ion): ?
Ionic radius (3+ ion): ?


Conductivity


Thermal conductivity: 0.58 W/cmK
Electrical conductivity: ?
Polarizability: ?


Abundance


Source: synthetically prepared
Relative abundance solar system: ?
Abundance earth's crust: ?
Estimated crustal abundance: Not Applicable
Estimated oceanic abundance: Not Applicable
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 


History


On August 29, 1982, physicists at the Heavy Ion Research Laboratory, Darmstadt, West Germany made and identified element 109 by bombing a target of 209Bi with accelerated nuclei of 58Fe. If the combined energy of two nuclei is sufficiently high, the repulsive forces between the nuclei can be overcome.

In this experiment, a week of target bombardment was required to produce a single fused nucleus. The team confirmed the existence of element 109 by four independent measurements. The newly formed atom recoiled from the target at predicted velocity and was separated from smaller, faster nuclei by a newly developed velocity filter. The time of flight to the detector and the striking energy were measured and found to match predicted values.

The nucleus of 266X started to decay 5 ms after striking the detector. A high-energy alpha particle was emitted, producing 267/107X. This in turn emitted an alpha particle, becoming 258/105Ha, which in turn captured an electron and became 258/104Rf. This in turn decayed into other nuclides. This experiment demonstrated the feasibility of using fusion techniques as a method of making new, heavy nuclei.

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