Question

how is modern periodic table is superior to mandeleev table​

Answer 1

Answer:

because of the following reasons..

1) Mendeleev's table had only 9 groups whereas in the modern periodic table there are 18

2) Classification of groups into sub groups was not justified in Mendeleev's table like IA had alkali metals and IB had coinage metals but in modern periodic table they were kept

seperately.

3) According to modern periodic table , periodicity in properties is due to similar valence shell electronic configurations

Hope this helps :)

Answer 2

Answer:

Modern periodic table is based on a new rule ATOMIC NUMBER

Explanation:

Hello!!

Generally atomic mass was considered superior than atomic number but Mr. Henry changed all the views during his experiment and proving that atomic number is a property that is superior than atomic mass and atomic number determines the chemical properties of the elements.

Modern periodic table gives us an idea about the repetition of characters In a group but when it comes to Mr. Mendeleev's periodic table it is not completely applicable. ( It is applicable to some groups only. Fluorine and Sodium were placed 1A group but Sodium is an electropositive element and Fluorine is an electronegative element.

Modern chemistry is completely based on Modern periodic table.

But Mr. Mendeleev's work is always appreciable for his life long research and predicting the properties and positions of elements before they were found to have been existed.

All the periodic trends are applicable...

Thank you..