Question

WHAT ARE THE ACHIEVEMENTS OF MENDELEEVS PERIODIC TABLE?

Answer 1

Answer:

here you go my friend

Explanation:t

the achievements of Mendeleev's periodic table were: Mendeleev kept some blank spaces in the periodic table for the elements that were yet to be discovered. later as they are present in exceptionally low concentrations in the atmosphere due to their inertness

Answer 2

________Answer_______

✒Mendeleev's Periodic Table :-

=>The physical and chemical properties of elements are periodic function of their atomic mass .

✒Achievements :-

• In order to adjust elements in his periodic table the sequence was inverted in which elements with slightly greater atomic mass were placed before the element with Lower atomic mass.

• for example:- Cobalt (Co) with atomic mass 58.93 and Nickel (Ni) with 58.71

• He left some gaps from the Undiscovered periodic table . He predicted the existence of some element that had not been discovered.

• He named them by prefixing Sanskrit numeral Eka(one) to the name of preceding element in the same group.

• for example:- Scandium,Gallium, Germanium discovered later has properties to Eka- Boron( Scandium) , Eka - aluminium (Gallium) , Eka -silicon (Germanium)

• Noble gases which were discovered later could be placed in new group without disturbing the existing order.

__________Thank you ☺