Question

Q. Differentiate between the arrangement of elements in Mendeleev's periodic table and modern periodic table. (3 mark)

Answer 1

hlo....
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Answer 2

Hey

The difference between arrangement of elements in Mandeleev's periodic table and Modern periodic table :-


• Mandeleev arranged the elements on the basis of their reactivity with oxygen .

But ,

In modern periodic table , Henry Mousley arranged the elements on the basis of their increasing atomic number .


• Mandeleev left some space like as he hasn't mentioned the name if elements whicb doesn't react with oxygen ( not discovered at that time ) , so he simply left space .

But ,

In modern periodic table , it is mentioned clearly .


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