Question

What is modern table it’s advantages and disadvantages

Answer 1

Answer:

Advantage of Mendeleev Periodic Table :-

1.He left blank  Places which help scientist to discover new element

2.When Noble gasses was discovered Hel could add  it to periodic table without any major changle  

3.He predicted the property of new element  

Disadvantages :-

1. Couldn't explain position of Hydrogen  

2.Couldn't answer the question "Can we have an element with atomic mass 3 between Hydrogen and Helium  

3 He placed cobalt before Nickel though Cobalt has more mass

Explanation:

Answer 2

Answer:

It is easy to remember and reproduce. The systematic grouping of elements into four blocks; s, p, d and f has made the study of the elements more simple. The position of some elements which were misfit on the basis of atomic mass is now justified on the basis of atomic number