Without knowning the electronic configurations of the above of the atoms of elements Mendeleeff still Could arrange the elements nearly close to the arrangements in the modern periodic table . How can you appreciate this ?

Explanation

1 ) Mendeleff arranged the elements based on their atomic weights .
2 ) His idea that the elements with similar properties to be kept in a group shows his cleverness in arranging the atoms . Thorughs there are some lapses .
3) Arranging the elements in 8 groups resembles the Newlands arrangement of octaves
The elements in periodic are not showing any similarity in the properties .
5 ) Mendeleeff's vision must be appreciable , because he left some gaps predicting the exisiting of some elements which are not available at that time .
6 ) Atomic weights of some elements can be corrected by placing them in correct places
7 ) If we compare the long periodic table with Mendeleeff's table . we find many elements with their places unchanged .
8 ) One can see from these dissussions , that the Mendeleeff 's Accurate prediction and their eventual success made him and his classification of elements famous .Evan today his table of elements is followed with minimum modifications .
9 ) Mendeleeff 's periodic table was able to provide a scientific base for the chemistry which at that time was described as an unorganised kitchen .
10) in his honour the `101^(th ) ` element was named "Mendelevium ".