ChemGlobe: Meitnerium
- Electronic data along with general information and facts.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/109.html

LANL: Meitnerium
- History and basic information.
- http://periodic.lanl.gov/elements/109.html

Lenntech: Meitnerium
- Physical data and chemical properties.
- http://www.lenntech.com/Periodic-chart-elements/Mt-en.htm

Apsidium: Meitnerium
- Basic information and atomic structure.
- http://www.apsidium.com/elements/109.htm

EnvironmentalChemistry.com: Meitnerium
- Atomic structure, chemical and physical properties, and table of nuclides.
- http://environmentalchemistry.com/yogi/periodic/Mt.html

ChemicalElements.com: Meitnerium
- Basic information, atomic structure, and isotopes.
- http://www.chemicalelements.com/elements/mt.html

It's Elemental: Meitnerium
- Basic physical and historical information.
- http://education.jlab.org/itselemental/ele109.html

Visual Elements: Meitnerium
- General and physical information, and key isotopes.
- http://www.chemsoc.org/viselements/pages/meitnerium.html