Francium

chemicalelements.com

Basic information, atomic structure, and isotopes table.

150 visits May 11, 2025 Details

environmentalchemistry.com

Atomic structure, chemical and physical properties, and table of nuclides.

30 visits May 17, 2025 Details

scescape.net

Data tables and historic information.

100 visits Sep 2, 2025 Details

geocities.com

Isotopes, natural occurrence, separation, analytical properties, applications, and bibliography.

312 visits Dec 25, 2025 Details

lenntech.com

Physical data and chemical properties.

250 visits Oct 1, 2024 Details

ebelements.com

Extensive information on history and properties.

186 visits Mar 10, 2025 Details

en.wikipedia.org

Properties of the element, including its history and characteristics.

50 visits Mar 20, 2025 Details