Francium was discovered by chance by Marguerite Perey in 1939 during a study on actinium-227: she observed an energy level of radiation 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.
The atomic number of francium in the Periodic Table is 87.
Francium is in the period 7 and group 1 of the periodic table (alkali metals).
Francium has the largest atomic radius in Group 1 of the Periodic Table.
Francium is amrmber of the alkali metal familiy (group 1 in the Periodic Table of Mendeleev): Li, Na, K, Rb, Cs, Fr.
Fr
Francium
The atomic number of francium is 87.
Francium is in the group 1 of the periodic table (alkali metals).
Position of francium in the Periodic Table of Mendeleev: group 1 (alkali metals), period 7, atomic number 87.
Francium is in the group 1 (alkali metals) of the periodic table.
Francium
It stands for Francium
This element is francium in the first group of periodic table.