Francium was discovered by Marguerite Perey in 1939 during a study on actinium-227: she observed an energy level possibly attributable to a new element. After some chemical experiments she was sure that the radiation is from a new chemical element, after this called francium.
we can see in the first group
Francium was found by Marguerite Derey of the Curie Institute of France in 1939.
Francium doesn't exist in air.
Francium is a member of the alkali metals family.
Natural francium exist in uranium and thorium ores.Artificial francium is obtained in particle accelerators.
Francium is not exclusively found in France, but rather, it is found throughout the Earth in extremely small quantities. Francium was discovered by a French scientist, Marguerite Perey.
Francium exist in uranium and thorium ores but it is not exploitable.
It was found in 1939.
francium is commonly found as hard rock unless it comes from gravestones
Francium exist in infinitesimal concentrations in uranium and thorium ores.
It is estimated that only approx. 30 g francium exist on the Earth.
In the nature francium exists only in infinitesimal amounts and because of this, it is considered generally an artificial element. Francium reacts with water.