Question

(100points question please answer)
what are the merits and demerits of mendeleev's periodic classification.(four points needed plz)

Answer 1

What are the merits and demerits of Mendeleev periodic table?

Still have a question? Ask your own!

What is your question?

4 ANSWERS



Naga Sai Manam, studied Joint Entrance Examination Advanced at Sri Chaitanya Junior College, Ongole

Answered Aug 2, 2018

Originally Answered: What are the merits and demerits of Mendeleev's periodic table?

Merits of Mendeleev Periodic Table

Some gaps were left for the elements yet to be discovered. Thus, if a certain new element is discovered, it can be placed in a new group without disturbing any existing group.

Demerits of Mendeleev Periodic Table

He was unable to locate hydrogen in the periodic table.

Increase in atomic mass was not regular while moving from one element to another. Hence, the number of elements yet to be discovered was not predictable.

Later on, isotopes of elements were found which violated Mendeleev’s periodic law.

Answer 2

demirits-

1-m.p.t did not provide place for nobel gases which was introduce later on

2-there is no place for iceotope

3-could not assign a correct position for hydrogen because it resembles cl , br,and also na,k