Question

What two major shortcomings of mendeleevs periodic table? How have these been removed in the modern periodic table ?

Answer 1

hey, here is your answer :-

▶ SHORTCOMINGS

1. Position of hydrogen

➡ Electronic configuration of hydrogen resembles with alkali metals more. Moreover, it combines with halogen, oxygen and sulphur type of compounds as given by alkali metals.

2. Uncertainty in Atomic Masses

➡ Another problem was that the atomic masses do not increase in a regular manner in going from one element to the next .

3. Position of Isotopes

➡ Isotopes of an element have similar chemical properties but different atomic masses .

Isotopes of an element have similar chemical properties but different atomic masses .In Mendeleev's Periodic Table no place was given to these element.

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