Question

Newland and mendeleevs merits and demerits

Answer 1

Advantage of Mendeleev Periodic Table :-

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

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

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