Question

What is the achievement of mendeleev s periodic table

Answer 1

mendeleevs prediction was successfull as he left some gaps and it was filled with other elements in future

Answer 2

$\huge{Answer}$

$\bold\pink{ACHIEVEMENT}$

✔️Mendeleev left some gaps in the periodic table . Instead of looking upon these gaps as defects .

✔️Mendeleev boldly redicted the existence of some elements that had not been discovered at that time.

✔️And named it as Eka means one to name of preceding element in the same group

✔️Scandium, Gallium and Germanium, discovered later have properties similar to eka boron eka aluminium and eka silicon .

✔️After that his prediction was successfuly come true

$\huge\bold\green{BRAINLIST}$