Question

Select the limitations of Mendeleev's periodic
table from the given options.
1..Some elements with different properties were kept in the same group.
2..The position of hydrogen was not fixed.
3..The arrangement of elements on the basis of increasing atomic masses was not always followed.
4..Empty spaces were eft in case some new elements were discovered.

please answer​

Answer 1

Answer:

2 and 3 option

mendleev couldn't provide a position to hydrogen in the periodic table which was given later in the modern periodic table

Answer 2

$\sf\underline{Answer:}$

Option 1 and 3 are the limitations of Mendeleev's periodic table. Maybe even two because he couldn't explain the position of hydrogen.

[I hope you don't mind me answering these many ^^"]

Have a good evening!