Question

What are the discrepancies in Mendeleev’s periodic table?​

Answer 1

Answer:

Discrepancies in Mendeleev's periodic table :

• Position of hydrogen : The position of hydrogen in the periodic table is anomalous.
• Position of lanthanides and actinides : The elements from atomic number 57 to 71 are collectively known as lanthanides.

Answer 2

Answer:

In devising his table, Mendeleev did not conform completely to the order of atomic mass. He swapped some elements around. ... He corrected the known atomic masses of some elements and he used the patterns in his table to predict the properties of the elements he thought must exist but had yet to be discovered.

Explanation:

problem Mendeleev encountered was that sometimes the next heaviest element in his list did not fit the properties of the next available place on the table. He would skip places on the table, leaving holes, in order to put the element in a group with elements with similar properties.

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