Question

Explain in brief modern periodic table and Mendeleev periodic table ?? Good answer will be Mark as brainliest

Answer 1

(1)modern periodic table was given by Henry Moseley whereas Mendeleev periodic table was given by Dmitriv Mendeleev

(2)modern periodic table consisted of 18 groups and 7 periods whereas Mendeleev periodic table consisted 8 groups and 6 periods

(3)atomic number was the basis of modern periodic table whereas atomic mass was the basis of Mendeleev periodic table

Answer 2

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$\bold{a)\:Modern\:periodic\:table:-}$

It is classified on the basis of electronic configuration.

Therefore elements are classified into four categories which are as follows:

$\bold{s-block\:element}$

$\bold{p-block\:element}$

$\bold{d- block\:element}$

$\bold{f-block\:element}$

The modern periodic table is extended in such a way that there are $\bold{18\:groups\:and\:7\:periods.}$

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$\bold{b)\:Mendeleev's\:periodic\:table:-}$
 
In Mendeleev's periodic table, elements were arranged on the basis of the:-

=> Fundamental property
=> Atomic mass, and
=> Chemical properties.

During Mendeleev's work, only $\bold{63\: elements}$ were known.

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