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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.

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Q: What is the discovery of francium in the history of the periodic table?
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Related questions

Where does francium come in the periodic table?

Francium is in the period 7 and group 1 of the periodic table (alkali metals).


Does Francium have the largest atomic radius on the periodic table?

Francium has the largest atomic radius in Group 1 of the Periodic Table.


What period and group is francium in?

Francium is amrmber of the alkali metal familiy (group 1 in the Periodic Table of Mendeleev): Li, Na, K, Rb, Cs, Fr.


What is francium's symbol on the periodic table?

Fr


What is the most metalic in periodic table?

Francium


What number is francium on the periodic table of elements?

The atomic number of francium is 87.


What block is francium in?

Francium is in the group 1 of the periodic table (alkali metals).


What is the class of francium on the periodic table?

Position of francium in the Periodic Table of Mendeleev: group 1 (alkali metals), period 7, atomic number 87.


What is the group number for francium?

Francium is in the group 1 (alkali metals) of the periodic table.


What is the most active element on the periodic table?

Francium


What does fr stand for in the periodic table?

It stands for Francium


Where is the most reactive metal on the periodic table located?

This element is francium in the first group of periodic table.