Question

Where are the merits of mendeleev's periodic table

Answer 1

Answer:

1) Grouping of all the elements which were known at that time.

2) Left space for undiscovered elements which was essential.

3) Predicted accurate properties of undiscovered elements.

a) Element down the Al - Eka Aluminium which later came to be known as Gallium.

b) Element down the Si - Eka Silicon which later came to be known as Germanium.

c) Element down the B - Eka Boron which later came to be known as Scandium.

4) Correction of atomic masses of Be and B and also Au and Pt.

5) Made noble gases which were discovered just then as zero group without disturbing the periodic table.