ChemicalElements.com: Meitnerium
Basic information, atomic structure, and isotopes.
EnvironmentalChemistry.com: Meitnerium
Atomic structure, chemical and physical properties, and table of nuclides.
It's Elemental: Meitnerium
Basic physical and historical information.
Lenntech: Meitnerium
Physical data and chemical properties.
Visual Elements: Meitnerium
General and physical information, and key isotopes.
WebElements: Meitnerium
Information on history, isolation, and properties.