Question

List any two observations which posed a challenge to mandeleev periodic law.

Answer 1

Hi , there !!

here is your answer !!

1 ) Mendeleev periodic table doesn't fix position of Hydrogen .

2 ) mandeleev periodic table was based on atomic mass / weight .


hence , there are two drawback of Mandeleev periodic law .


hope it helps you !!


thanks !!

Ranjan kumar

Answer 2

The observations which posed a challenge to Mendeleev periodic table are ;

- Position of hydrogen in the first group among metal though it is non-metal.

- Placing the elements with higher Atomic mass before the elements with lower Atomic mass.

- No places were left in between two groups for isotopes.