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In 1869 when D. Mendeleev designed his Periodic Table any element in the period 7 was known.
Today francium is in the group 1, period 7, atomic number 87.
What else can I help you with?
Is francium a transition metal?
No, francium is not a transition metal. It belongs to the alkali metal group on the periodic table. Transition metals are found in the d-block of the periodic table.
What were mendeleevs discoveries and predictions and discoveries abot the periodic table?
Mendeleev predicted that properties of elements are periodic function of atomic mass. He demonstrated it by creating a table.
Which two elements on the periodic tabel would have been placed in different groups in moseleys periodic table but not in mendeleevs?
bi and po
Why Francium is not in Mendeleev Periodic Table?
Francium was discovered in 1939, several decades after Mendeleev created his periodic table in 1869. At the time Mendeleev developed his table, francium had not yet been identified, and elements were organized based on their known properties and atomic weights. Additionally, francium is a highly radioactive and unstable element, which made it difficult to study and include in early classifications of elements.
What does Fr stand for in periodic table?
Fr = Francium - the chemical element of atomic number 87, a radioactive member of the alkali metal group. Francium occurs naturally as a decay product in uranium and thorium ores.
Why the improvement in Mendeleevs periodic table was made?
To understand the concept of Periodic Table
Where does francium come in the periodic table?
Francium is in the period 7 and group 1 of the periodic table (alkali metals).
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.
Main idea of mendeleevs first periodic table?
In Mendeleev's periodic table, the elements were arranged in the increasing order of their atomic masses and repeating periodic properties.
What is francium's symbol on the periodic table?
Fr
What is the most metalic in periodic table?
Francium
What is the group and period for francium?
Francium is in the period 7 and group 1 of the periodic table (alkali metals).
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).
Is francium a transition metal?
No, francium is not a transition metal. It belongs to the alkali metal group on the periodic table. Transition metals are found in the d-block of the periodic table.
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.
