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Why was francium not in Mendeleev's periodic table?
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 is alkai metal?
Alkali metals are in the first group of the periodic table of Mendeleev: lithium, sodium, potassium, rubidium, caesium, francium.
What year did Mendeleev's publish the periodic table?
Mendeleev's published the periodic table in 1869.
What is the difference between the periodic table and Mendeleev's table?
Mendeleev's table was arranged by atomic mass and the periodic table is arranged by protons (atomic number).
What is the name of the table of elements?
A Periodic table The Periodic Table of the Elements.
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.
Why was francium not in Mendeleev's periodic table?
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 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.
How many alkaline are there in a periodic table?
Six alcaline elements in the periodic table of Mendeleev: lithium, sodium, potassium, caesium, rubidium and francium.
What is the family of francium?
Francium is a member of the alkali metals family, group 1 in the periodic table of Mendeleev: Li, Na, K, Cs, Rb, Fr.
Does francium have a family name?
Francium is a member of the alkali metals family (group 1 in the Mendeleev periodic table of the elements): Li, Na, K, Rb, Cs, Fr.
What is alkai metal?
Alkali metals are in the first group of the periodic table of Mendeleev: lithium, sodium, potassium, rubidium, caesium, francium.
What year did mendeleev publish periodic table?
Mendeleev's published the periodic table in 1869.
What was Dmitri Mendeleev first periodic table called?
Dmitri Mendeleev first periodic table is called Mendeleev's periodic table. Elements are arranged according to atomic mass.
Where does francium come in the periodic table?
Francium is in the period 7 and group 1 of the periodic table (alkali metals).
What is the first element of the Mendeleev's periodic table?
The first element of the Mendeleev's periodic table is hydrogen (H).
What year did Dmitri mendeleev pubish the periodic table?
In the yer 1869, Mendeleev published the periodic table.
