Question

Explain Mendeleev's periodic table and discuss it's advantage's and defects?​

Answer 1

Mendeleev's Periodic Law states that the properties of elements are the periodic function of their relative atomic masses. Mendeleev arranged all 63 elements; which were discovered till his time; in the order of their increasing relative atomic masses in a tabular form. It is known as Mendeleev's Periodic table

Answer 2

Answer:

Explanation:

ADVANTAGES

1) He could classify all the 63 elements discovered at that time on the basis of similarity in properties.

2) He left gaps for the elements to be discovered.

3) He predicated the properties of the undiscovered elements which were same as predicated.

4) It helped in correction of at.weight of certain elements on the basis of their position in the Periodic Table.

LIMITATION

1) Even the elements were placed in order of incerasing order of atomic masses , incerasing order could not be maintained in all cases.(Cobalt 58.93 nickle 58.71)

2) Mendeleev's Periodic Table did not provide place for noble gases which were discovered later.

3) There was no proper place for isotopes,

4) Hydrogen did not had a proper place .