Question

Mendeleev's periodic law limitations plz

Answer 1

Answer:

* No fixed position for hydrogen

* No place for isotopes

* No regular trend in atomic mass.

* Co was placed before Ni.

Answer 2

Answer:

limitations :

1. he couldn't justify the place of hydrogen.
2. he couldn't justify the place of isotopes
3. the elements with a slightly greater atomic mass placed before an element with slightly less atomic mass..