compare and contrast the arrangement of elements in Mendeleev's periodic table and the modern periodic table
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In mendeleev periodic table, there is an arrangement of elements on the basis of atomic mass but the modern periodic table is arranged on the basis of atomic numbers.
In mendeleev periodic table, there is an arrangement of elements on the basis of atomic mass but the modern periodic table is arranged on the basis of atomic numbers.
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Mendeleev's periodic table
It has 6 periods and 8 groups .
Arranged on the basis of atomic masses .
Inert gases are absent .
Transition element are not separated.
Lanthanide and actinides are absent .
Position of element are unpredictable.
Modern periodic law
It has 7 periods and 18 groups .
Arranged on the basis of atomic numbers.
Inert gases are included in separate group.
Transition element are placed in separate group.
Lanthanoide and actinoides are placed at bottom .
No are easily predicted.
It has 6 periods and 8 groups .
Arranged on the basis of atomic masses .
Inert gases are absent .
Transition element are not separated.
Lanthanide and actinides are absent .
Position of element are unpredictable.
Modern periodic law
It has 7 periods and 18 groups .
Arranged on the basis of atomic numbers.
Inert gases are included in separate group.
Transition element are placed in separate group.
Lanthanoide and actinoides are placed at bottom .
No are easily predicted.
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