➤ It has a positive effect on the functioning of the nervous system and muscular skeleton, on the functioning of the heart muscle and the musculoskeletal system.

➤ Stabilizes blood glucose levels, improves the quality of tooth enamel.

➤ It accumulates in red blood cells and heart muscle.

➤ It is considered a trace element with a very short half-life, so all isotopes of Franconium decay quickly and do not accumulate in the body.

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➤ ²²³Fr improves the course of such diseases as gastric ulcer, anthrax, and tetanus.

➤ Radioactive Fr is used for diagnostic purposes for cancer, as it selectively accumulates in tumors in the early stages of their development.

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➤ Leads to the development of thyroid carcinoma and causes radiation sickness.

➤ Antidote: Symptomatic therapy.

➤ Fr decays with alpha and beta radiation

➤ In 1953, French scientists isolated Fr from the mixture by paper chromatography in 10-40 minutes.

➤ Fr is the heaviest and most active alkali metal. The half-life of ²²³Fr is 22 minutes.